Kidney deficiency may lead to swollen legs. Usually, kidney qi deficiency and kidney yang deficiency may cause swollen lower limbs, while kidney yin deficiency does not usually cause swollen lower limbs. 1. Kidney qi deficiency: Due to overwork and exhaustion of the patient, the kidney qi is depleted and the qi of the kidney is out of order, resulting in swelling of the lower limbs, lumbar and knee soreness (the feeling of soreness and weakness of the lumbar and knee), tiredness and fatigue (fatigue and fatigue), loss of libido, long and clear urination, and increase in nocturia, which need to be warmed and tonified to treat the symptoms of kidney qi. 2. Kidney-Yang deficiency: Patients with Kidney-Yang deficiency cannot warm water-dampness and water-dampness gathers in the lower limbs, resulting in swelling of the lower limbs and clinical symptoms such as coldness (fear of cold, cold limbs), cold pain in the waist and knees, impotence and premature ejaculation, clear and long urination, frequent urination, etc., which need to be warmed and tonified to cure the Kidney-Yang (warming and replenishing the kidney yang qi). However, kidney yin deficiency does not usually lead to swelling conditions. There are many clinical causes of leg swelling, and it is recommended that patients consult with a regular hospital in a timely manner to clarify the cause of the disease and treat the cause of the disease, and do not delay the condition by taking medication on their own.