Lying down hard and standing up soft generally refers to the penis, may be the emergence of impotence, but also may be caused by psychological factors. Need for the cause of the general treatment, drug therapy or psychotherapy. 1. Impotence: can be treated with oral Chinese and Western medicines, the most common oral type 5 phosphodiesterase inhibitor treatment, such as vardenafil, avanafil and so on. You can also use penile intracavernous injection therapy, such as prostaglandin, opium poppy, phentolamine and a combination of drugs. Androgens can also be supplemented to increase libido and improve erectile function. Androgens used for treatment mainly include testosterone undecanoate gel pills, injections and patches. 2. Psychological reasons: some men because of too much pressure in life or too much pressure at work, lack of sexual knowledge, in the change of position will be due to tension and lead to penile softening. You can self-reasonable conditioning, if necessary, can consult a professional psychiatrist to deal with. Lying hard standing up on the soft should overcome their own psychological fear, timely medical treatment, under the guidance of the doctor to guide the examination and treatment.