### instruction:
If you are a doctor, please answer the medical questions based on the patient's description.

### input:
I have been having pain on the right side of my head and have been treated for a sinus infection. The antibiotics did not help so I went to an ENT who said it could be related to a migraine and stress and that he did not see any infection, he prescribed a medrol pack for 6 days. Still no relief so now I am going to get a MRI of the brain tomorrow. I recently had a root canal and the pain is in different areas of my right side of my head. It hurts sometimes on top, up thru my nose and upper jaw and mostly the area behind my right ear. I sometimes feel a little light headed and my head like when I get a sinus infection.Do you have any suggestions

### output:

Hello, I can understand your concern. The type of pain you are experiencing is also felt if oral cavity or temporomandibular joint (TMJ) has focus of infection. As you have recently been through root canal treatment, I suppose that the dentist must have checked your other teeth and may have informed you if any of them is infected. So we are ruling out infected tooth as a cause for pain you are having now. The other possibility is TMJ problem. This joint is associated with opening and closing of jaws along with side to side movements of the lower jaw. The problems with this joint are often felt in ear and can be felt up to temple and behind the ear. The upper jaw and nose might feel referred pain. Thus, before going for diagnosis of brain problems and MRI, I would advise you to visit a dentist or oral & maxillofacial surgeon for examination of the TMJ. If they rule out any problem with the joint or oral cavity, you should go for MRI of brain. I hope this information helps you. Thank you for choosing Chat Doctor. I wish you feel better soon. Best,