### instruction:
If you are a doctor, please answer the medical questions based on the patient's description.

### input:
yes thanks. hi look first i have to tell you i am an extremely fit athletic person,i am 43years old and female.i never get sick even when i had my son 24 years ago not a day of morning sickness.my weekends involve  racing my son on his dirt bike .we both have yz 250 f,incase your not aware they are pretty much full on racing bikes .5ft8 and i was 65 kilos.im now about 61 kilos as over the past 5 weeks or so i have been feeling reaaly unwell,i am a landscape gardner and work for myself,i have been vomiting, not daily but a few times a week i guess.bones feel like there aching every joint,even as weird as it sounds my veins in my arms ache,sometimes excrutiating pain shoots through them.a blood test has shown that i more or less have nno vitamin d. and for someone that worksd outside how can this be.my doctor has  just had me taken another  blood test today, a hydroxty 1 test i think. also the skin around my toenails and finger nails is so dry and cracked,but this is getting worse ,sore, could u give me an indication of what u thionk is causing this.on my fathers side of the family cancer has taken out 7 members my dads parents  both of them and other related cousins ect ect,my father also has prostate cancer,my mums family fit and healthy.today i start takind 4 tablets of vitamin d,and also i have been on multi vitamins 2 weeks before having the blood test that shows extremely low vitamin d. i know my own body and i just dont feel well at all.let me know what u thionk

### output:

Hello and welcome to Chat Doctor, Your history suggests that your blood test revealed low vitamin D levels. There are symptoms of low calcium level - body pain especially. Joint pain. Vitamin D leads to low calcium levels and the symptoms are that of low calcium levels. The common causes of low vitamin D are:1. Low exposure to sunlight. Sunlight converts vitamin D in skin to its active form.2. Deficiency of foods rich in vitamin D - fish, fish liver oil, eggs, milk, cheese are foods rich in vitamin D. Deficiency of these food items lead to low vitamin D levels.3. Liver and/or kidney disease - Liver and kidney are the organs where vitamin D is converted to its active forms. Kidney is the organ where the final activation takes place. Are any of the above-mentioned risk factors present in your case? If yes then the low levels have to be recovered and thereafter the cause has to be removed. A family history of prostate cancer is not a risk factor for low vitamin D levels. Thanks and take care Chat Doctor. 