The blood pressure is always high at night, which may be related to irregular work and rest. For people who sleep late at night, often stay up late at night, and have midnight snack and other activities, the blood pressure at night is often high. For the type of blood pressure fluctuation, the conventional blood pressure is spoon type blood pressure, while the reverse spoon type blood pressure, with normal blood pressure in the daytime and increased blood pressure at night, tends to have a high incidence of cardiovascular and cerebrovascular events at night. For summer hypertension, the phenomenon of elevated blood pressure at night often occurs, which is related to changes in people's daily work and rest in summer. For blood pressure, it is always high at night, It may also be that cardiovascular and cerebrovascular diseases occur at night, leading to secondary increase of blood pressure. Therefore, attention should be paid to exclude basic cardiovascular and cerebrovascular diseases and carry out systematic treatment.