Men with cold knees may be a kidney deficiency, usually caused by kidney Yang deficiency or kidney deficiency water flood evidence. However, the specific situation should be combined with other systemic conditions to determine, based on a single symptom can not accurately determine. If you have any discomfort, please go to the hospital for medical treatment. Kidney deficiency is further categorized into kidney yang deficiency, kidney water flooding deficiency and kidney yin deficiency. Among them, the main symptoms of kidney yang deficiency include cold pain in the waist and knees, loss of libido, nocturia, and coldness. Symptoms of Kidney Yin Deficiency are similar to those of Kidney Yang Deficiency, but there are also symptoms of swelling and shortness of urine. The main symptoms of Kidney Yin Deficiency include lumbar and knee soreness (a feeling of soreness and weakness in the waist and knees), dizziness and tinnitus, spermatorrhea in men, menstrual disorders, scanty menstruation and amenorrhea in women, and insomnia and excessive dreaming, etc., but the problem of cold knees does not usually occur.