If the male can not erect, then the treatment. 1. If it is erectile dysfunction, you can take 1 tablet of sildenafil orally half an hour before sex, or 1 tablet of tadalafil 36 hours before sex. After receiving sufficient sexual stimulation, about 70% of the patients can achieve a relatively good hyperemic erectile state to complete sexual life. 2. If the erectile nerve is damaged due to pelvic fracture or prostate surgery, the patient will not be able to erect. Early use of neurotrophic drugs, such as oral vitamin B, mecobalamin tablets, etc., take one tablet each time, three times a day, and observe whether the erectile function is improved after four consecutive weeks. For patients who cannot erect due to complete nerve injury, penis prosthesis implantation can be considered. After the prosthesis is implanted, artificial erection can be achieved through water bag or air bag to restore normal sexual life. 3. If there are psychological factors that lead to erectile dysfunction, an erectile function test is required to monitor whether the patient has normal erectile status during sleep. If the patient's erectile function is normal during sleep monitoring, it is recommended to give psychological counseling treatment, and take 1 tablet of sildenafil orally half an hour before sexual life to observe the improvement of erectile function.