My son (14 yrs old, 6'2, 155 lbs) has had chronic, DAILY headaches for almost 4 years. They seem to have started after he landed on his chin in a bicycling accident. All MRI's,CAT scans, Blood tests, echochardiogram, spinal tap and neurological exams are normal. He has been to the following specialists: He is on his THIRD neurologist, tmj specialist, chriopractor, (3) physical therapists, rheumotologist, opthamologist, ENT, tried biofeedback, OBI dentistist.