Functions Tonifies the kidneys, improves swelling Indications For patients with moderate or weak constitution, tendency to fatigue, cold limbs, decreased urination or polyuria, and occasional thirst, including: leg pain, lower back pain, numbness, blurred vision in the elderly, itching, difficulty urinating, residual urine, nocturia, frequent urination, edema, and improvement of hypertension-related symptoms (shoulder stiffness, headache,…