The mechanism of fatigue in hypertensive patients is muscle ischemia and hypoxia. There are seven reasons for this: 1. Heart rate is too slow resulting in lower cardiac output. 2. 2, blood pressure is lowered too low or too large to adapt. 3, symptoms of hypothyroidism. 4, Coronary angina patients, quite angina attack. 5, Cardiac insufficiency resulting in ischemia of the limbs. 6, Chronic lung disease with insufficient oxygen supply. 7, Patients with vegetative nerve dysfunction with heavy subjective sensation.