Silkworm sand has the efficacy of removing dampness and harmonizing the stomach, and is used for wind-cold-dampness paralysis (the three evils of wind, cold and dampness invade the human body and cause paralysis of the limbs), vomiting, diarrhea and turning tendons (the persistent tense and stiff muscles that appear after vomiting and diarrhea), and amenorrhea. Silkworm sand is the feces of the larvae of silkworm moths of the genus Bombyx mori, family Bombyx mori. It is sweet, pungent and warm in nature; it belongs to the liver, spleen and stomach meridians. It has the effect of dispelling wind and dampness (dispelling wind and dampness in the body), harmonizing the stomach and resolving dampness. It is mainly used for treating wind-cold-dampness paralysis, hemiplegia (inability to move one side of the limb freely), vomiting and diarrhea and turning of the tendons, wind rash and itching, amenorrhea, and metrorrhagia (excessive menstrual flow or dripping). Silkworm sand is used with Qiangwu, Duhong, Weilingxian to treat wind-dampness and cold paralysis; with Fangji, Coix Seed, Gardenia, etc. to treat wind-dampness and heat paralysis (often manifested as burning, pain, redness and swelling of joints and muscles, etc.), and troublesome pain in the limbs and joints. Silkworm sand should not be used for liver and kidney deficiency, blood deficiency loss of glory of the waist and knee soreness and weakness (waist and knee soreness and weakness of the feeling) cold pain. It is recommended to use the medicine under the guidance of a doctor and never take the medicine on your own.