When you can’t get hard during intercourse, i.e. erectile dysfunction, it may be related to mood, exertion, disease and so on, according to the reason, you need to keep a pleasant mood, rest, medication, surgical treatment. 1. Mood: because of anger during intercourse, sudden quarrels, emotional reasons for erectile dysfunction, to calm the mind, husband and wife feel good, happy mood, and then intercourse can be erectile. 2. Exhaustion: because of overwork, physical inability to cause, it is recommended that the patient rest more, to save energy, in time can be restored to a normal erection. 3. Disease: common systemic diseases such as hypertension, coronary heart disease, diabetes mellitus, thyroid disease, penile diseases such as severe penile and glans phimosis, penile sclerosis can be caused by coitus hard, need to be directed at the cause of the treatment, but also follow the doctor’s instructions to take phosphodiesterase 5 (PDE-5) inhibitors, androgens, penile vascular surgery, back to normal. If patients have erectile dysfunction, it is recommended to consult a doctor in time to clarify the cause of the disease and then treated under the guidance of the doctor.