For male patients, the erection of the penis at night may be normal or pathological phenomenon.
1. Normal condition: For normal physiological state, at night when sleeping, the parasympathetic nerves are excited, and the penis is subject to both sympathetic and parasympathetic innervation, so it may cause the phenomenon of penile erection.
2. Pathological factors: certain inflammatory diseases of the urinary system, such as cystitis or glansitis, because of the stimulation of inflammation, it will make the penis erect, and it may be erected during the day and at night while sleeping.
For people who have penile erection at night, it is recommended to go to the regular hospital in time, to clarify the cause of the disease, and early treatment.