user13711: Buddhism teaches to respect parents. I do follow. But when ever i bow down our relation with my mother, she constantly tries to bring me down. She makes me feel bad for the way i look. I cannot change my skin color or my height. She nags about my appearance. My childhood was ruined and now she is making me depresses by saying no guy would like to marry me. It is getting hard to listen to her day by day. I am a person who upholds goodcharacter above anything. I can never say a bad word to anybody's face. Yet i am facing this almost everyday by my mother. When she fell ill i could not leave he and i was the one who suffer her illness more than her mentally. I feel bad as why she cannot see me as a daughter and love me when all i want is to make her happy. 
What mistake have i done in my past life to her that she is constantly taunting me to death.

user13713: Yes toxic parents create a delicate situation which becomes irritating and later on very draining of mental energy. It is very easy for the grown up child to see existence has being wasted.
 THe biggest mistake you can do, for you and your parents, is to be  angry, resentful, mad, mean, crossed with  your mom.
You ask about past karma, but until you can see for yourself the workings of the karma, speculating about this is detrimental to you, just like relying on the remarks of your mother.
You can care being criticized by a buddha and other arhants, but worrying about the remarks of a normal person who tries to be mean makes you miserable like you clearly  claimed. Caring about those words is not worth it, it goes against your sake. So the solution is to stop caring about her remarks. THe method for this really to become enlightened but that could be a lot of work if you care about what must not be cared.
To dilute her effects on you, you can do the simplest thing, to wit to put space and time between you and her.
You can leave in another house if you have the money and find somebody to rent you an accommodation. You can then later on still go to see your mom.
You can even enroll in a monastery if you can no longer stand her and fails to find an accommodation.
Second, you can talk regularly to her, but sometimes people do not change, even when they see that their actions lead to failure, even when they see that their actions do not give them what they want, especially when the claims and advises they hear come from a person that they do not take seriously, typically one of their children.
Perhaps you can get a person, like a bikkhu, appreciated by your mom for her words, to talk to your mom and you.
THe third way is the best way but requires far more work from you. THe method gives you endurance in face of negative people. You are upset at her words and perhaps her actions because you manage to care about her words and about the topic of her claims. 
for instance, You claim that she makes claims about your height. Even if you are very small or very tall,  It turns out that the height is not significant, not relevant to follow the dhamma.
Height matters only to people who do not want to follow the dhamma, who care about living in the society and want what is wrong to want in order to stop being unhappy, like fame or being attractive to other people in the society.
Words are only words and as long as you ''do not take up'' the words, like words of insult or mockery, you will be fine.
See the sutta of some puthujjana insulting the buddha.
https://www.accesstoinsight.org/tipitaka/sn/sn07/sn07.002.than.html
In order to dilute the power of her words on you and for you stop being upset by her words, you can remember that you do not fall for her remarks and you stick to being a good person, you can dilute your attachment to what could be seen as the ''best years of your life'' (in order to weaken your view that many years of your existence have been wasted) by thinking that life is long and you are able to endure a few years of audible mediocrity.
See the sutta about being cut in half by mean people.

"In the same way, monks, there are these five aspects of speech by
  which others may address you: timely or untimely, true or false,
  affectionate or harsh, beneficial or unbeneficial, with a mind of
  good-will or with inner hate. Others may address you in a timely way
  or an untimely way. They may address you with what is true or what is
  false. They may address you in an affectionate way or a harsh way.
  They may address you in a beneficial way or an unbeneficial way. They
  may address you with a mind of good-will or with inner hate. In any
  event, you should train yourselves: 'Our minds will be unaffected and
  we will say no evil words. We will remain sympathetic to that person's
  welfare, with a mind of good will, and with no inner hate. We will
  keep pervading him with an awareness imbued with good will and,
  beginning with him, we will keep pervading the all-encompassing world
  with an awareness imbued with good will equal to a catskin bag —
  abundant, expansive, immeasurable, free from hostility, free from ill
  will.' That's how you should train yourselves.
"Monks, even if bandits were to carve you up savagely, limb by limb,
  with a two-handled saw, he among you who let his heart get angered
  even at that would not be doing my bidding. Even then you should train
  yourselves: 'Our minds will be unaffected and we will say no evil
  words. We will remain sympathetic, with a mind of good will, and with
  no inner hate. We will keep pervading these people with an awareness
  imbued with good will and, beginning with them, we will keep pervading
  the all-encompassing world with an awareness imbued with good will —
  abundant, expansive, immeasurable, free from hostility, free from ill
  will.' That's how you should train yourselves.

In order to dilute the power of her words on you, you can remember that Sometimes a person can only stop doing bad things, stop saying bad words by dying. So you just have to wait. Her pollutions will not last long.
Always have in mind that this situation is not permanent and that taking her words seriously, that caring about the remarks, especially from a puthujjana, which have nothing to do with being a good person with respect to the dhamma is detrimental to you and would lead you to being an awful person too.
Always have in mind that your mom is not enlightened. Do not hold grudge against her.

user8157: Your mother has ignorance & suffering in her mind. Respectfully, your mother is mentally unbalanced. Your situation is unrelated to anything in an imagined past life. The Buddha taught in this world there are children who are morally inferior to their parents; children who are morally equal to their parents; and children who are morally superior to their parents. In your case, you are morally superior to your mother; who lacks moral sensibilities. 

user-1: 
What mistake have I done in my past life to her that she is constantly taunting me to death.

If you are literally asking about your past Karmas, to figure out the reason behind your current life situation, then, it is impossible for other, you yourself have to reach that level of meditative awareness to remember your past life. The ways of Karma are not linear also the ripening of fruits is also not linear, you receive the fruits when the environment is right. 
Furthermore, if you blame your past life for your present life, then you can again blame your past to past life for the deeds of past life, so the regression is infinite. So the first thing to solve the problem is that stop blaming past life or Karma or anything for that matter. The first step is to accept the situation. The first step is acceptance. 
How can you solve this problem?
From a Buddhist context, you really have two problems here, one is Attachment and other is Expectations. 
As much as I have studied human psychology I can tell you that hatred of mother for her child is usually dissociated, meaning she does not really hate you as a child but maybe she hated your father or something like that, but sometimes humans are not capable to locate the real reasons of hating somebody, so her nagging about your looks is simply her own misunderstanding of the exact thing that was bothering her about you. So the next step is to look at you mother as a human rather than 'your mother', this will free you from the attachment you have, and will be able to help you to solve the problem objectively. 
Second is you stop expecting love and affection from your mother. This expectation is same as desires, which Buddhism talks of in great detail. The suffering here is caused because you desire your mother to behave in a certain way and she is not doing it, as the Buddha said, "not getting what you want is suffering". So this is the second thing you have to learn, to drop your desire.
The next step is to learn not to react, I suggest you should do a 10 day Vipassana  retreat of S N Goenka. Here you will learn to watch the sensations without reacting to them, you will have to apply the same to your relating to your mother. So whenever she insults you, you just watch, the unpleasant sensation arising in your mind and its impermanence. Ths will help you get rid of a lot of emotional trouble. 

she is making me depresses by saying no guy would like to marry me.

So you are depressed by her words that no guy will like to marry you. Well, you have to understand something here, if you are depressed then your mother's prophecy will be self-fulfilling because no guy will want to marry a depressed girl. So instead of feeling depressed, you fill your heart and mind with loving-kindness and compassion. If you are loving then love will come in your life, but remember the inherent unsatisfactoriness of everything. To accomplish this, I will suggest that you should also learn some Metta meditation. Ajahn Brahm is the best teacher for this, see his Youtube videos on this topic. If you could give Metta to your mother under your current situation, then you have won, girl. 
Look at the bigger picture
You take my word for this, and I assure you, that if it would not have been your mother bothering you it would have been someone else, something else. The first of the Noble truth is, There is Suffering in life. So instead of thinking that it was your bad karma that got you an undesirable mother, maybe it was your good karma that the suffering you are entitled has led you to ask important questions in life about Karma and past life. Life's plots are complicated, your mis-fortune sometimes is your greatest fortune. 
Think about the story of the Buddha, He had a perfect father, His father kept Him in utmost luxury possible, gave Him everything, but still, you can imagine His suffering that He had to leave His palace in the middle of the night, teary-eyed, to find the end of the suffering. 
So think about this, that getting a good mother or good father is also not the solution to life's suffering. Those who got have their problems. Follow the Dhamma taught by the Buddha, that's the only true way out. 
Contemplate on this story told by Ajahn Brahm and last thing I will suggest you read the book 'Who ordered this truckload of Dung' by Ajahn Brahm. Thit will change your entire perspective. 
Metta to you. 

13711: <p>Buddhism teaches to respect parents. I do follow. But when ever i bow down our relation with my mother, she constantly tries to bring me down. She makes me feel bad for the way i look. I cannot change my skin color or my height. She nags about my appearance. My childhood was ruined and now she is making me depresses by saying no guy would like to marry me. It is getting hard to listen to her day by day. I am a person who upholds goodcharacter above anything. I can never say a bad word to anybody's face. Yet i am facing this almost everyday by my mother. When she fell ill i could not leave he and i was the one who suffer her illness more than her mentally. I feel bad as why she cannot see me as a daughter and love me when all i want is to make her happy. 
What mistake have i done in my past life to her that she is constantly taunting me to death.</p>
 13713: <p>Yes toxic parents create a delicate situation which becomes irritating and later on very draining of mental energy. It is very easy for the grown up child to see existence has being wasted.
 THe biggest mistake you can do, for you and your parents, is to be  angry, resentful, mad, mean, crossed with  your mom.</p>

<p>You ask about past karma, but until you can see for yourself the workings of the karma, speculating about this is detrimental to you, just like relying on the remarks of your mother.</p>

<p>You can care being criticized by a buddha and other arhants, but worrying about the remarks of a normal person who tries to be mean makes you miserable like you clearly  claimed. Caring about those words is not worth it, it goes against your sake. So the solution is to stop caring about her remarks. THe method for this really to become enlightened but that could be a lot of work if you care about what must not be cared.</p>

<p>To dilute her effects on you, you can do the simplest thing, to wit to put space and time between you and her.
You can leave in another house if you have the money and find somebody to rent you an accommodation. You can then later on still go to see your mom.
You can even enroll in a monastery if you can no longer stand her and fails to find an accommodation.</p>

<p>Second, you can talk regularly to her, but sometimes people do not change, even when they see that their actions lead to failure, even when they see that their actions do not give them what they want, especially when the claims and advises they hear come from a person that they do not take seriously, typically one of their children.
Perhaps you can get a person, like a bikkhu, appreciated by your mom for her words, to talk to your mom and you.</p>

<p>THe third way is the best way but requires far more work from you. THe method gives you endurance in face of negative people. You are upset at her words and perhaps her actions because you manage to care about her words and about the topic of her claims. 
for instance, You claim that she makes claims about your height. Even if you are very small or very tall,  It turns out that the height is not significant, not relevant to follow the dhamma.
Height matters only to people who do not want to follow the dhamma, who care about living in the society and want what is wrong to want in order to stop being unhappy, like fame or being attractive to other people in the society.
Words are only words and as long as you ''do not take up'' the words, like words of insult or mockery, you will be fine.
See the sutta of some puthujjana insulting the buddha.
<a href="https://www.accesstoinsight.org/tipitaka/sn/sn07/sn07.002.than.html" rel="nofollow noreferrer">https://www.accesstoinsight.org/tipitaka/sn/sn07/sn07.002.than.html</a></p>

<p>In order to dilute the power of her words on you and for you stop being upset by her words, you can remember that you do not fall for her remarks and you stick to being a good person, you can dilute your attachment to what could be seen as the ''best years of your life'' (in order to weaken your view that many years of your existence have been wasted) by thinking that life is long and you are able to endure a few years of audible mediocrity.
See the sutta about being cut in half by mean people.</p>

<blockquote>
  <p>"In the same way, monks, there are these five aspects of speech by
  which others may address you: timely or untimely, true or false,
  affectionate or harsh, beneficial or unbeneficial, with a mind of
  good-will or with inner hate. Others may address you in a timely way
  or an untimely way. They may address you with what is true or what is
  false. They may address you in an affectionate way or a harsh way.
  They may address you in a beneficial way or an unbeneficial way. They
  may address you with a mind of good-will or with inner hate. In any
  event, you should train yourselves: 'Our minds will be unaffected and
  we will say no evil words. We will remain sympathetic to that person's
  welfare, with a mind of good will, and with no inner hate. We will
  keep pervading him with an awareness imbued with good will and,
  beginning with him, we will keep pervading the all-encompassing world
  with an awareness imbued with good will equal to a catskin bag —
  abundant, expansive, immeasurable, free from hostility, free from ill
  will.' That's how you should train yourselves.</p>
  
  <p>"Monks, even if bandits were to carve you up savagely, limb by limb,
  with a two-handled saw, he among you who let his heart get angered
  even at that would not be doing my bidding. Even then you should train
  yourselves: 'Our minds will be unaffected and we will say no evil
  words. We will remain sympathetic, with a mind of good will, and with
  no inner hate. We will keep pervading these people with an awareness
  imbued with good will and, beginning with them, we will keep pervading
  the all-encompassing world with an awareness imbued with good will —
  abundant, expansive, immeasurable, free from hostility, free from ill
  will.' That's how you should train yourselves.</p>
</blockquote>

<p>In order to dilute the power of her words on you, you can remember that Sometimes a person can only stop doing bad things, stop saying bad words by dying. So you just have to wait. Her pollutions will not last long.
Always have in mind that this situation is not permanent and that taking her words seriously, that caring about the remarks, especially from a puthujjana, which have nothing to do with being a good person with respect to the dhamma is detrimental to you and would lead you to being an awful person too.
Always have in mind that your mom is not enlightened. Do not hold grudge against her.</p>
 8157: <p>Your mother has ignorance &amp; suffering in her mind. Respectfully, your mother is mentally unbalanced. Your situation is unrelated to anything in an imagined past life. The Buddha taught in this world there are children who are morally inferior to their parents; children who are morally equal to their parents; and children who are morally superior to their parents. In your case, you are morally superior to your mother; who lacks moral sensibilities. </p>
 -1: <blockquote>
  <p>What mistake have I done in my past life to her that she is constantly taunting me to death.</p>
</blockquote>

<p>If you are literally asking about your past Karmas, to figure out the reason behind your current life situation, then, it is impossible for other, you yourself have to reach that level of meditative awareness to remember your past life. The ways of Karma are not linear also the ripening of fruits is also not linear, you receive the fruits when the environment is right. </p>

<p>Furthermore, if you blame your past life for your present life, then you can again blame your past to past life for the deeds of past life, so the regression is infinite. So the first thing to solve the problem is that stop blaming past life or Karma or anything for that matter. <strong><em>The first step is to accept the situation. The first step is acceptance.</em></strong> </p>

<p><strong>How can you solve this problem?</strong></p>

<p>From a Buddhist context, you really have two problems here, one is <strong>Attachment</strong> and other is <strong>Expectations</strong>. </p>

<p>As much as I have studied human psychology I can tell you that hatred of mother for her child is usually dissociated, meaning she does not really hate you as a child but maybe she hated your father or something like that, but sometimes humans are not capable to locate the real reasons of hating somebody, so her nagging about your looks is simply her own misunderstanding of the exact thing that was bothering her about you. So the next step is to look at you mother as a human rather than '<em>your mother</em>', this will free you from the attachment you have, and will be able to help you to solve the problem objectively. </p>

<p>Second is you stop expecting love and affection from your mother. This expectation is same as desires, which Buddhism talks of in great detail. The suffering here is caused because you desire your mother to behave in a certain way and she is not doing it, as the Buddha said, "not getting what you want is suffering". So this is the second thing you have to learn, to drop your desire.</p>

<p>The next step is to learn not to react, I suggest you should do a <strong>10 day Vipassana</strong>  retreat of S N Goenka. Here you will learn to watch the sensations without reacting to them, you will have to apply the same to your relating to your mother. So whenever she insults you, you just watch, the unpleasant sensation arising in your mind and its impermanence. Ths will help you get rid of a lot of emotional trouble. </p>

<blockquote>
  <p>she is making me depresses by saying no guy would like to marry me.</p>
</blockquote>

<p>So you are depressed by her words that no guy will like to marry you. Well, you have to understand something here, if you are depressed then your mother's prophecy will be self-fulfilling because no guy will want to marry a depressed girl. So instead of feeling depressed, you fill your heart and mind with loving-kindness and compassion. If you are loving then love will come in your life, but remember the inherent unsatisfactoriness of everything. To accomplish this, I will suggest that you should also learn some <strong><em>Metta meditation</em></strong>. Ajahn Brahm is the best teacher for this, see his Youtube videos on this topic. If you could give Metta to your mother under your current situation, then you have won, girl. </p>

<p><strong>Look at the bigger picture</strong></p>

<p>You take my word for this, and I assure you, that if it would not have been your mother bothering you it would have been someone else, something else. The first of the Noble truth is, <strong>There is Suffering in life</strong>. So instead of thinking that it was your bad karma that got you an undesirable mother, maybe it was your good karma that the suffering you are entitled has led you to ask important questions in life about <strong><em>Karma</em></strong> and <strong><em>past life</em></strong>. Life's plots are complicated, your mis-fortune sometimes is your greatest fortune. </p>

<p>Think about the story of the Buddha, He had a perfect father, His father kept Him in utmost luxury possible, gave Him everything, but still, you can imagine His suffering that He had to leave His palace in the middle of the night, teary-eyed, to find the end of the suffering. </p>

<p>So think about this, that getting a good mother or good father is also not the solution to life's suffering. Those who got have their problems. Follow the <strong><em>Dhamma</em></strong> taught by the Buddha, that's the only true way out. </p>

<p>Contemplate on <a href="https://nice-inspiration.blogspot.com/2011/06/ajahn-brahms-inspiring-wisdom-truckload.html" rel="nofollow noreferrer">this story</a> told by Ajahn Brahm and last thing I will suggest you read the book 'Who ordered this truckload of Dung' by Ajahn Brahm. Thit will change your entire perspective. </p>

<p>Metta to you. </p>
