Suddenly can not get hard may be a manifestation of erectile dysfunction, the main consideration is related to psycho-psychological factors, organic factors, drug factors and so on. 1. Psychological factors: lack of sexual skills, bad sexual experience, economic pressure and depression, schizophrenia, etc., can trigger erectile dysfunction. 2. Organic factors: organic diseases such as prostatitis, pituitary tumors, diabetes, etc., can also trigger erectile dysfunction. 3. Drug factors: during the application of drugs such as reserpine and furosemide, it can lead to erectile dysfunction and other adverse reactions. The symptoms of sudden hardness may also be related to other factors, and it is recommended that patients seek medical treatment as soon as possible.