Hi mam... The word COLD you mention is not clear mam, whether you are mentioning common cols or having cold food items.. Let me explain both    If you are getting tooth ache during common cold means it is due to SINUSITIS....  Sinusitis is  inflammation of sinus due to infection.... FLOOR OF MAXILLARY SINUS is near to the upper back teeth region ...so, whenever you have cold , you will have reffered pain in your upper back teeth If you are getting tooth ache by taking cold food items, it may be due to cavitation,or erosion which expose underlying dentin layer...In this condition Simple filling has to be done to cover the exposed dentin.. You need to take x_ray(IOPA) of involved tooth to determine the depth of cavitation....

Brushing too hard or using a hard-bristled toothbrush. This can wear down enamel, causing dentin to become exposed, or encourage gum recession Gum recession. ... Gingivitis. ... Cracked teeth(cavity) . ... Teeth grinding or clenching.

Hello visit  may be you got a cavity in some tooth which is the cause of the  pain.need treatment. Visit

Probably u may hv a deep cavity in ur tooth.it can be treated by RCT

Visit to dentist and get your x ray done

Plz specify which tooth?any cavity?

Do you get pain while you have cough/cold or when you have cold food? Things vary. If its pain whole eating cold, it s possible for it to be a tooth problem. If its a cold associated pain, it may simply be reffered pain. Don't ignore these symptoms, meet a dentist..

You may need of rct. Visit to dentist for proper treatment.