Soreness of the waist and knees (the feeling of soreness and weakness of the waist and knees) and slippery semen are not necessarily caused by kidney deficiency, and their common causes include physiological causes (overwork, etc.) and pathological causes (kidney yang deficiency, kidney qi deficiency). 1. Physiological causes: overwork, poor sleep and other factors can also cause lumbar and knee soreness and spermatorrhea. Generally speaking, maintaining good living habits, paying attention to rest, and avoiding staying up late can alleviate the symptoms of lumbar and knee soreness and spermatorrhea. 2. Pathologic causes: (1) Kidney yang deficiency evidence: if soreness and tenderness of the waist and knees and slippery semen appear at the same time, the cause of the disease may be kidney yang deficiency. Kidney yang deficiency refers to the deficiency of kidney yang, and the body loses its warmth, which is commonly manifested as soreness and coldness of the waist and knees, decreased libido, and nocturnal urination, etc. It can be treated by taking traditional Chinese medicines such as ripened earth, Chinese yam, cornelian cherry, Chinese wolfberry, and cuscuta. (2) Kidney qi not solid evidence: soreness of the waist and knees, semen at the same time may also be caused by kidney qi not solid evidence, kidney qi not solid evidence refers to the deficiency of the kidney qi, the loss of sealing, fixing, common manifestations of soreness of the waist and knees, fatigue (mental fatigue, physical weakness), tinnitus deafness, etc., can be through the use of gold cherry seed, cuscuta seed, cuttlebone, gorgonian fruit and other traditional Chinese medicines to treat. To determine whether the soreness of the waist and knees and slippery semen is kidney deficiency, it needs to be determined by the doctor after identification, and then standardized treatment under the guidance of the doctor, and not blindly use medication.