Hi there, Thanks for your query. Your son had apparently had repeated concussions of the brain. At times, effects of concussion last for a weeks or even months. Further, associated contusion of scalp muscles leads to their going into spasm, which manifests as post-exercise headaches. A 5-7 days course of a combination of anti-inflammatory pain-killers and muscle relaxants will relieve muscle spasm. YES. it can also be exercise-induced migraine attacks, though less likely in your son s case. If he has headaches lasting for more than 4 hours, with associated nausea, vomiting or sensitivity to light, then it could be exercise-induced migraines. Lastly, sometimes, mild concussion of the brain may be associated with either, a minor fracture of the skull bone; or, a mild bleeding (subdural hemorrhage) which too would manifest as exercise induced headaches. A CT Scan is therefore recommended to rule out/detect these possibilities. Consult your doctor and apprise him of my opinion. I am certain that he agree with me, order required tests, and- based on the reports- will prescribe suitable treatment as advised. If you find my response helpful and informative, do not forget an “excellent” (5-star rating) to my answer, to ENCOURAGE all doctors- engaged in social service- to render sound advice to the FREE queries. Fond regards and have a nice day Dr. Rakesh Karanwal