I have major tooth pain and had xray done on it nothing showed ? what could it be and what can i do for pain

See an Endodontist: It could be that the nerve in the tooth is irreversibly damaged, causing pressure and therefore the pain. X-rays will not show whether the nerve of the tooth is alive or dead. I would suggest that you see an endodontist who specializes in this area to further evaluate the tooth. Even if you take pain medication and it helps, the problem will not be solved and the pain will only return!

Get a diagnosis!: An x-ray image, excellent in disclosing "between the teeth decay", is very limited in finding the second most cause of severe tooth pain...A cracked tooth. While some cracked teeth visibly shear off a tooth wall, some imperceivable cracks can penetrate to the nerve and require a root canal or go beyond the nerve and require extraction. There are other diag. Tests that can be done beside x-rays.

Another opinion: If you are having severe pain, i suggest another opinion, it could be a nerve issue and further testing is advisable.

Another dentist: Get another opinion, preferably from an endodontist. If endodontist says tooth normal, more complicated. Maybe atypical odontalgia. If so, see orofacial-TMJ expert.

Tooth pain: The most common cause of tooth pain is infection. The second most common cause is a cracked tooth. If your Dentist is not seeing anything it's time to be evaluated by a root canal specialist, an Endodontist. Tooth may need root canal/crown or extraction/implant/crown.