Calf pain may be caused by kidney yin deficiency, but kidney yin deficiency has many accompanying symptoms, and it is impossible to identify the cause based on only one symptom; calf pain can also occur when the calf muscles are not stretched in time after exercise, so you should consult a doctor to diagnose and clarify the cause of the problem. Kidney yin deficiency, also known as kidney yin deficiency, kidney yin deficiency or true yin deficiency, is a symptom of insufficient yin in the kidneys. Kidney yin deficiency is often caused by prolonged illness, excessive sex life, prolonged late night, unhealthy diet and so on. The main manifestations of the five heart heat (the heart of the two hands and the heart of the two feet is hot, and conscious of the heart and chest heat (irritability and sultriness)), hot flashes (a burst of heat), night sweats (after going to sleep sweating abnormally, waking up sweating to stop), lumbar and knee soreness (lumbar and knee soreness and weakness of the feeling of pain) and pain, etc., so calf soreness may be caused by the deficiency of kidney yin. In addition to the physical examination such as looking and sniffing, the doctor can also conduct hormone measurement, kidney function test, ultrasonography and so on according to the patient’s condition. The doctor can make a clear diagnosis based on the examination results combined with the patient’s clinical symptoms and medical history. If you feel unwell, you should go to the hospital in time to avoid delaying your condition.