Black beans are flat and sweet; Spleen and kidney meridian; Has the effects of detumescence, moistening lung, clearing away heat, promoting blood circulation, inducing diuresis, expelling pathogenic wind, removing arthralgia, nourishing blood, tranquilizing mind, improving eyesight, invigorating spleen, tonifying kidney, nourishing yin, and removing toxic substances, and can be used for treating edema, beriberi due to wind toxicity, jaundice edema, spasm due to wind arthralgia, puerperal wind pain, sores on mouth and tongue, carbuncle swelling, detoxification, wind heat control and night sweats.