The causes of headache after electrotherapy include mental tension, electrotherapy stimulation, elevated blood pressure and so on. 1. Mental tension: when doing electrotherapy, patients may be mentally nervous, which will be accompanied by headache symptoms. 2. Stimulating effect of electric current: when doing electrotherapy, due to the strong stimulating effect of electric current, resulting in muscle tension throughout the body, which triggers headache, usually after a period of rest will return to normal. 3. Hypertension: if the patient suffers from high blood pressure, do electrotherapy may lead to increased blood pressure fluctuations, there will be headache symptoms, can choose antihypertensive drugs to adjust blood pressure. After doing electrotherapy headache can consult a doctor in time, under the guidance of the doctor to dispose of.