Usually, patients who want to increase penile hardness can improve it through exercise and oral medication. 1. Exercise: patients can do aerobic exercise, such as running, cycling, etc., can improve their cardiorespiratory function, promote blood circulation throughout the body, so that more blood to reach their penile corpus cavernosum will help their erectile function and maintain penile hardness. 2. Oral medication: you can also choose sildenafil, tadalafil and other drugs to improve the symptoms, these drugs can make their own penile cavernous body vasodilatation, to achieve the effect of maintaining the hardness of penile erection. Drugs need to be applied under the guidance of a doctor. If patients have erectile dysfunction, they need to go to the regular hospital in time for examination and early treatment.