Toothache and sensitivity are the main symptoms of pulpitis. The pain you feel usually varies depending on the stage of the inflammation. Symptoms of reversible pulpitis include: No pain when your dentist taps the tooth. No sensitivity to heat. Sensitivity to cold or sweets that goes away quickly. People often describe this as a sharp pain. With irreversible pulpitis, you may experience: Pain when your dentist taps the tooth. Sensitivity to heat, cold or sweets that lasts more than a few seconds. This can be a throbbing, aching or sharp pain. If pulp necrosis occurs and the nerve tissue dies, you may not have any sensitivity to heat, cold or sweets. But your tooth may still hurt when your dentist taps it.