Why am i still in severe pain in tooth after treatment?

Depends: It depends on the treatment performed on the tooth. Was it root canal, filling, bonding, etc? Was it an ext.

More information?: You gave us too little information to work with. Call your dentist to discuss this issue. Sorry we can't be of more help.

Too little info.: I would also suggest going back to your dentist for further evaluation or a referral to a facial pain specialist.