A man’s inability to have an erection is part of penile erectile dysfunction for a number of reasons, such as age factors, chronic diseases of the body, drug factors, psychological factors, and bad habits. 1. Age factor: with age, the level of androgen in the body will decline, which may cause erectile dysfunction. 2. Chronic systemic diseases: such as chronic cardiovascular disease, chronic hypertension, diabetes, chronic tumors, prostatitis, prostate hyperplasia and other diseases, may also cause erectile dysfunction. 3. Drug factors: antihypertensive drugs, sedative drugs, hormonal drugs, etc., can also lead to erectile dysfunction. 4. Psychological factors: mental pressure, thought burden, and emotional factors of husband and wife can also lead to erectile dysfunction. 5. Unhealthy habits: Irregularity in life and diet, excessive late night, labor, as well as smoking, alcoholism, frequent masturbation, may also lead to erectile dysfunction. Once you have erectile dysfunction or other uncomfortable symptoms, please go to the hospital for examination and treatment under the guidance of the doctor.