I have a deep pain from 1 or 2 teeth and/or gums on bottom. my dentist says it's irritated gum. he said there were no indication of abcess or infection and that teeth appear normal. what is problem?

Second opinion: Dental pain can be very uncomfortable and persistent. Provided your dentist said you have gingivitis you could try an antiseptic gargle if you haven't already. If an X ray was not done a second opinion with another dentist face to face might provide more answers. Good luck.

Deep pain: Deep pain can be caused by a number of things, including your bite, bone loss, a necrotic nerve, and sometimes a fracture Since these things cannot be diagnosed over the internet, you will need to seek a second opinion from another local dentist (or even a specialist) to get to the "root" of your problem. All the best...

Irritated gum: Your dentist may be referring to inflammation caused by plaque, a film on the teeth that can inflame the gums. The good news is that your dentist told you that you had no serious dental problems. Otherwise, serious gum disease and dental decay - periodontal disease - can cause irritation of the tooth's nerve roots, possibly requiring a root canal procedure. Hope that helps.