Tooth and Mouth Problems

After root canal process completed doctor kept a cotton ball in the tooth I want to know the reason why

I can feel "GUILTY" kind stuff ,down the teeth from inner side of my mouth.Pls suggest.

Started using Colgate Sensitive tooth paste from yesterday night, since i am wearing braces. Will there be any side effects since am facing a problem of Cold, headache and body pains from the morning.

I have had bad breath since i was 11 and has haunted me since.The dentists say my teeth are fine.I usually have white milky saliva.What could be the cause

I HAD STREP THROUT OVER THE WEEKEND AND MY TONGUE AND GUMS HAVE BECOME EXTREMELY RAW IT HAS BEEN A STRUGGLE TO EVEN DRINK WATER DUE TO THE AMOUNT OF STINGING. PLEASE HELP, I JUST WANT TO EAT AND DRINK LIKE NORMAL AGAIN.

The front portion of my tooth are not properly align. Which is the best method to go for, which can be within the budget of a student

I have a wisdom tooth that hurts but 2 doctors advised not to remove and 1 said i could remove it but may face the risk of tearing the nerve as the tooth has a part in the end that splits and is a milimeter away from the nerve

In 36 (as doctor written) of my teeth I e in lower left doctor prescribed me rct, for same 10 years ago doctor told me to go for grafting... I was confused and some other dentist extracted my wisdom tooth and told ur pain will be relieved now . I again went to doctor 4 days ago as very severe pain in 36 and she told me rct required.... 2 doctors gave me different opinion I e grafting vs rct... Will you please tell me difference... Pain of my teeth radiated in nearby teeth as well ear

I had what looked like a couple pimples on the tip of my tongue about a week ago. I don’t know if they are irritated from me bothering them or if they just getting worse, but now they are more like spots on my tongue.

I am getting wisdom teeth left side it's paining a lot since 3 days Under chin also left side its paining too much due to this I am feeling head ache nausea and feverish please suggest me anything like tablet temporarily and give permanent solution too