Lack of erection hardness may be caused by psychological factors, poor penile muscle endurance, erectile dysfunction and other reasons. You can enhance the hardness of penile erection through psychological therapy, strengthening exercise and medication. 1. Excessive tension: If men have psychological pressure, anxiety and depression, and do not learn to relax reasonably, it may lead to insufficient erection hardness. It can be improved by usual good psychological guidance, communicate with each other, pay attention to attention and other psychological therapies. 2. Poor penile muscle endurance: If the male penile muscle endurance is too poor, it may lead to sexual life, penile erection hardness is not enough. You can increase the muscle content of the penile region of the body by strengthening the exercise, such as squatting, lifting the anus and other methods of exercise. 3. Erectile dysfunction: you can use medication under the guidance of a doctor, such as sildenafil citrate, tadalafil, etc., which can improve penile blood flow, increase the hardness of penile erection and erection maintenance time. Usual life should pay attention to regular sexual life, maintain a good state of mind, it is recommended to go to the regular hospital in time, under the guidance of professional doctors to take targeted treatment.