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

### input:
Im a 17 year old female going to college in the fall about 1 1/2 hours away. Ive been dealing with root resorption in my right front tooth for about a year now, and have had a root canal done. When that was done my tooth was grey and after putting a bleach pellet in it to whiten it up, it sent severe nerve pain to my mouth and surrounding teeth. The other thing we did when that did not effectively work was my dentist gave me a veneer on my front tooth which still has not effectively masked the grey. I went to him yesterday for a consult and we have decided on putting a full crown to attempt to cover it yet again. Thats honestly the least of my worries at the moment though because I took a nap just an hour ago and when I woke up and looked in the mirror I had blood surrounding my front tooth. My dentist and endodontist have already told me I wont be able to keep my tooth forever but they dont know when the loss will be - whether in 1 year or 20. Is this a bad sign? (He didnt even touch my tooth yesterday during the consult) and the blood was only on that one tooth.

### output:

Dear Madam, I understand your problem. You must have undergone some trauma to your front teeth several years before root canal treatment was done.That's the reason for the resorption of the teeth and color change. Your dentist has attempted saving the tooth since it's not mobile and it's savable. Now the bleeding might be because of the gum problem surrounding the tooth and the veneer. They would have attracted food and plaque which resulted in inflammation of gums and in turn bleeding. Just clean under the gums around that tooth with a dentist and take antibiotics. Nothing to worry about this bleeding and the lifespan of your tooth. Hope your query is answered. For further queries pleased hesitate to contact back. Thank you.