Erectile dysfunction in men may be caused by psychological factors, neurological damage and vascular disorders. 1. Psychological factors: If the patient has excessive tension, anxiety and mental stress, it may cause male erection difficulties. 2. Neurological damage: If the patient has central and peripheral nerve disease or damage due to various reasons, it may also lead to male erection difficulties. 3. Vascular disorders: when the patient has atherosclerosis, arterial damage and arterial stenosis, etc., it may lead to a decrease in blood flow to the cavernous arteries of the penis, which may lead to male erection difficulties. Therefore, it is recommended that patients go to professional hospitals for timely examination to clarify the cause of the disease and target treatment.