Try to find out the area where u r having sensitivity ... if pain lasts for more than few seconds then I think u may require RCT ...consult the dentist he may suggest you after examination or having IOPA

Are you having this problem in any one tooth or in full mouth you are experiencing it. In one tooth probably the decay has reached to the nerves .please see a dentist for clinical evaluation.without seeing the condition it's difficult to say anything.

Hi sir..    Your teeth may got infected    First and foremost is to take X Ray (IOPA)to rule out the exact cause   If the cavity reaches the nerve layer(pulp layer)then root canal treatment should be done followed by capping(crowns)    There are several types of crown materials are available     Ceramic with warranty Rs.5000/-per teeth    Ceramic without warranty Rs.3500/-per teeth   Zirconia crowns Rs.10000/-per teeth Zirconia crowns are best The material of choice is depends upon your affordability

Hello Looks like you have decay in the tooth it was good if you mentioned the tooth Visit a dentist and please have a check up Because medication won’t help you

Hi. It seems you have irreversible pulpitis. Means the tooth is decayed beyond only filling. Please visit endodontist.  Take care.

You may be having a deep cavity that may have infected the pulp of the tooth. You may require a root canal in that tooth. Sometimes sensitivity can also be due to gum recession and root exposure. Clinical examination and X-rays are required to advise you properly