<human>: 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
<bot>: 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.