Hello6 months ago I got filling of m upper tooth done for d second time...now I feeling pain and sensitivity in dat tooth ..even d color of th tooth has chanhed to lite grey...and dere is pain even while touching or chewing something..I dnt know  what is wrong with it suddenly after six months
Hello, Change in Color with increasing pain and sensitive to pressure is a definite sign of an infected tooth. I suggest that you return to your dentist for an x-ray and diagnosis. You may be placed on an antibiotic and need to have a root canal on this tooth. Swelling or formation of a bubble on the gum near the tooth may develop. Do not ignore this condition as it can worsen. Was your filling very deep? This is not uncommon for a tooth that has been filled multiple times. Take some anti-inflammatory medication such as Tylenol or Advil and avoid chewing on the tooth until you visit your dentist. Thank you for your interest. Please schedule a visit soon.