For normal men, there is no need to increase the hardness of the penis. However, if erectile dysfunction exists, it can be improved by medication, physical therapy and surgery. 1. Medication: For patients with erectile dysfunction, you can take sildenafil, tadalafil, avanafil and other phosphodiesterase 5 inhibitors as prescribed by the doctor, which can increase the hardness of men. If it is caused by low androgen levels, you can take androgenic drugs such as testosterone undecanoate as prescribed by your doctor to improve your symptoms. 2. Physical therapy: patients with erectile dysfunction can also take physical therapy, such as vacuum erection device therapy, the use of negative pressure to attract blood flow into the cavernous body of the penis, thus prompting an erection, improve the penis is difficult to get an erection, hardness is not enough and other symptoms. 3. Surgery: If conservative treatment is ineffective, patients can also take surgical treatment, surgical methods include penile vascular surgery, penile prosthesis implantation surgery. It is recommended that patients with erectile dysfunction go to regular hospitals for consultation and standardized treatment under the guidance of professional doctors.