A weak erection should be a symptom of a lack of erection, or a lack of firmness in the sex, also known as impotence. Erectile insecurity is Yin or Yang deficiency, it is caused by Yang deficiency. It is mostly caused by kidney yang deficiency, failure of the vital fire, and deficiency of essence and cold. Therefore, clinically, you can also see symptoms of kidney yang deficiency such as yellowish white color of the face, as well as dizziness, mental depression, soreness and weakness of the waist and knees. The treatment should be given to tonify the kidney and strengthen the Yang, Chinese medicine often take Wu Zi Yan Zong Wan to treat. Of course, impotence can also be caused by excessive thinking that damages the heart and spleen, resulting in a deficiency of both qi and blood, or it can be caused by fright that hurts the kidneys, or it can also be caused by damp-heat injection.