Well herb has the effect of clearing heat and dampness (removing heat and dampness from the body), promoting blood circulation and reducing swelling. Drinking it in water has fewer active ingredients and generally fails to achieve the therapeutic effect. Well-bordered grass, also known as black wolfberry, is the whole grass of the plant rough phoenix-tail fern, which is cool in nature, pungent and slightly bitter in flavor, and is attributed to the liver, large intestine and bladder meridians. It is suitable for people suffering from urinary tract infection, diarrhea, edema, cholecystitis, rheumatic paralysis, carbuncle sores, bruises and pain. The adverse reactions, contraindications and precautions of this product are not clear at present. If there is a need to use this product, it should be applied under the guidance of a traditional Chinese medicine practitioner, and should not be taken on its own to avoid adverse consequences.