Morning erection, which refers to male erection in the early morning, is generally a normal physiological phenomenon, but it may also be related to diseases and other factors. Morning erection mainly refers to the natural erection of the penis in the early morning at 4~7 o’clock in the unconscious state of the male, which is not controlled by thoughts, situations and actions, and is a normal phenomenon. Usually men may have morning erections when they enter puberty or adulthood. Generally with age, the number of morning erections will increase, and the duration will be relatively longer, but after the age of 30, it will gradually decline or decline. The presence of tuberculosis, spinal cord injury, high blood pressure, diabetes, etc. may also affect sexual life and morning erections. At the same time, morning erections are also related to drugs, holding urine, sleep and bad habits and other factors. It is recommended that men do not need to worry too much when they have morning erections, but if they have abnormal morning erections, they need to be actively diagnosed and treated, and the causative factors need to be clarified and actively treated.