It is difficult to determine how long it takes to get well, but the key is to find the cause and actively treat it. The degree of erection is divided into four levels: Ⅰ, Ⅱ, Ⅲ and Ⅳ degrees. The hardness of Ⅰ degree is like a tofu block, Ⅱ degree is like a peeled banana, Ⅲ degree is like a banana with skin, and Ⅳ degree is like a cucumber. Theoretically, it is possible to complete sexual life as long as it reaches degree III. In the physiological case, it can be seen that the man is physically fatigued, having sex too often, staying up late, poor nutrition, etc., which can be gradually restored after corresponding conditioning. But in pathological cases, such as elevated blood lipids, arteriosclerosis, diabetes, hypertension and other diseases, due to the low blood flow of the penile cavernous artery is also prone to cavernous insufficiency, erection is not firm, then need to actively treat the original disease, the original disease is controlled, the patient erection but the symptoms can also be improved. If a patient occasionally has an unstable erection, do not have too much pressure, rest and relaxation can generally be recovered, but if it is a long time erection but not firm, or timely medical care to find the cause.