Paroxysmal high-amplitude sharp waves are a kind of EEG findings, which may belong to epilepsy, or may be caused by migraine and other reasons. 1. Epilepsy: It is a chronic brain disease caused by a variety of factors. The excessive discharge of neurons in the brain leads to unconscious convulsions and transient central nervous system malfunctions, which may cause paroxysmal high amplitude sharp waves on EEG. 2. Migraine: If you have frequent temple pain or fluctuating pain, as well as nausea and photophobia, paroxysmal high amplitude sharp waves may be caused by migraine. Paroxysmal high amplitude sharp waves, there may be other reasons, need to go to the hospital in time for further examination, to clarify the cause of the disease.