Night erection is very good, but the hardness of sexual life erection is poor, itself most not accompanied by organic lesions, the main reason mainly includes the physical decline, testosterone lower, too many times of coitus, and psychological condition abnormalities, etc., through the daily conditioning can be improved. 1. Physical decline: physical weakness, nutritional deficiencies, and long-term fatigue can lead to a decline in physical fitness, affecting the blood supply to the spongy body and leading to abnormal erectile conditions. 2. Reduced testosterone: Androgen plays an important role in regulating the erectile status of men, and reduced hormone levels can lead to the production of related symptoms. 3. Excessive coitus: Excessive coitus can cause low erection hardness because of low nerve excitability. 4. Abnormal psychological condition: Having a bad experience of having sex, resulting in too much mental stress, will have a certain impact on the erection condition. There may be other reasons for the poor erection hardness in sexual life, and you need to go to the regular hospital in time, and under the guidance of the clinician to carry out standardized treatment.