What Causes Headaches After Wisdom Tooth Removal?

Hi Health desk My mother aged about 60 years, she has dental problem and remove her wisdom teeth, but unfortunately she has occurred heavy headache. we have contact doctor and test a CT scan of head which is as under 1. few small low attention areas are seen involving bilateral basal ganglia representing lacunar infarcts. 2. the ventricles and cortical sulci appears dilated representing age related atrophy. 3. no evidence of acute territorial ischemich infarction, bleed or mass lesion. 4. minimal mucosal thickening is seen involving the right ethmoid air cells representing sinusitis/polyphoidal thickening. my mother head ache is continue till today , my request is kindly help and support for this matter sadiq