What causes headaches?

Family practice . Migraine, stress/ tension, sinus pressure, changes in vision, vasculitis, high blood pressure, cerebral aneurysm , and possibly a tumor mass. Persistent ha's should be evaluated.
Controversial. Exact causes unknown. I have observed people with bad headaches suffer precedent chronic neck muscle spasm & muscle-tension headache. If neck muscles & posture can be improved, terrible migraine type headaches will mollify. Acupuncture, massage, physical therapy, yoga, biofeedback, & aquatherapy are means to this end. Large breasted women must develop rhomboid strength & more military posture.