When i open my mouth or stick my tongue my mouth hurts sides top of jaw. should i go to the dentist?

Did you always have this problem, or is this a recent occurrence. Are your teeth/gums In good condition, no broken teeth. Did you experience any trauma to jaw. Do you clench your teeth. Most likely you should see Doctor of Dental Medicine/Oral Surgeon to express your concerns, and be examined.

You could have a number of problems. Canker sore, TMJ, muscle strain, trauma to area. Best see a dentist for exam.