The unstable blood pressure in spring is due to the large temperature difference between morning and evening in spring, the temperature is cold and hot, it will cause the fluctuation of blood pressure, may also be due to self-adjustment of the dose of medication and other reasons. 1. Seasonal reasons: The heat stress effect of rising temperatures causes a sudden rise in body temperature and a drop in blood pressure. When the temperature decreases, the body in order to maintain normal body temperature, blood vessels will have obvious contraction, vascular resistance will increase, in order to ensure the blood supply of the whole body, blood pressure will rise. When the temperature difference between morning and evening is large, many elderly people due to poor blood vessel elasticity, blood pressure fluctuations will be more obvious. 2. Self-adjustment of the dosage of medication: some hypertensive patients pay more attention to their hypertensive disease, may be overly concerned about and nervous about the changes in blood pressure, daily blood pressure will be measured frequently, and sensitive to changes in the value of blood pressure, as soon as the value of the discovery of the high on the addition of medication, the value of the low on the immediate reduction of medication, which will also cause the blood pressure of the fluctuation of the high and the low. In spring, patients with unstable blood pressure should take medication according to the doctor’s guidance, avoid adjusting the dose of medication on their own, and usually maintain a good lifestyle, go to bed early, get up early, exercise appropriately, and maintain a happy mood, which is conducive to the stabilization of high blood pressure.