He just had 6 dental cavity fillings in his mouth. Ever since, from next day onwards, he has been having continuous headache in his central head region. Although he hasn't had any pain in the jaw or ear area. Can this be because of this cavity fillings? My doubts are based on the fact that this procedure was carried out by a newly opened dental clinic in the area, and also before going with the procedure, the dentist didn't take any x-rays to gauge the depth of cavities.