Morning erection every morning may be a normal physiological phenomenon, but also may be the night holding urine, pathological factors and other reasons, if there is no discomfort symptoms, do not need to be overly concerned. 1. Normal physiological phenomenon: male morning androgen secretion is more, in the night is lower, the penis will naturally erect in the early morning, is a normal physiological phenomenon. 2. Holding urine at night: the bladder is not emptied before going to bed, and when you wake up, the urine remains in the bladder, compressing the organs and giving rise to erection symptoms. 3. Pathological factors: If the patient is not normal morning erection or erection accompanied by pain during intercourse and other uncomfortable symptoms, you need to consult a doctor to check whether it is caused by disease stimulation, physical overwork and so on. If the symptoms are not relieved, or accompanied by other symptoms, you should go to the hospital in a timely manner, to clarify the cause and give targeted treatment.