Kidney deficiency can be judged according to one’s clinical symptoms and performance, but it is often prone to errors in judgment, and it is advisable to seek the help of a Chinese medicine practitioner. Kidney deficiency is often caused by overwork, sexual indiscretion or chronic illness. Kidney deficiency is mainly categorized into kidney yin deficiency, kidney yang deficiency and kidney essence deficiency. Kidney yin deficiency is generally manifested as lumbar and knee soreness (the feeling of lumbar and knee soreness and weakness) and weakness, dry mouth and tongue, hot palms and feet, hot flashes at night (a burst of heat), night sweats (sweating abnormally after going to sleep, and waking up and sweating stops), tinnitus and deafness, and so on. Kidney yang deficiency is usually manifested as cold extremities (cold extremities, even to the elbows and above the knees), fear of cold, dysuria (unsmooth urination), cold pain in the waist and knees, edema, impotence and premature ejaculation in men, and menstrual irregularities in women. Kidney essence deficiency is common in children with growth retardation, adults with impotence and premature ejaculation, premature aging, forgetfulness, tinnitus, hair loss, loose teeth, pale tongue and weak pulse. If there is any discomfort, it should be diagnosed by a Chinese medicine practitioner and standardized treatment should be provided to avoid delaying the condition.