<s>[INST] I ve been having headache on the left of my head in the back for about 5 day ,also my shoulder , arm,jaw,front of head. About a hour ago I felt a small lump on that area where my headache has been hurting . I when to the emergency room yesterday , I also for got to tell about two bad teeth I have on that side . EMR doctor think it the teeth, so they gave me an antibiotic to take every 6 hour. Help! [/INST] Hi. Thanks for your query. Noted the history and understood your concerns. Since all your symptoms are on the same side, that is pain on the back of head, shoulder, teeth, shoulder, arm, jaw the most probable cause can be Trigeminal Neuralgia. But you have already been started on an antibiotic. I would advise you the following in such a situation:Get your clinical check-up again and to see if the blood pressure is normal or not. MRI for the Trigeminal Nerves and also the tests of blood and urine. If required get an opinion of a Neurologist to see for the neurological problems. The symptoms going into the shoulder and arm is also indicative of some problems in the cervical spine like spondylitis and muscle spasms causing nerve entrapment. Apply local Rubefacient on the neck. Take rest in bed to relax muscles and also take medications like anti-inflammatory, muscle relaxants. This may give you a relief. </s>