Cactus can be taken orally and applied externally to make compound medicine. Oral administration can treat many diseases, such as peptic ulcer, epigastric pain, ascites due to cirrhosis, viral enteritis, acute bacillary dysentery, bronchial asthma, cough due to lung heat, lung abscess, toothache, insomnia, cervicitis, hemorrhoid bleeding, etc. External application can treat furuncle, sore, virus and other inflammatory diseases, such as parotitis, mastitis, lymphadenitis, phlebitis, snake bite, dog bite, scald, chilblain, eczema, tinea manuum, alopecia in children, psoriasis, induration after infusion, heel pain, herpes zoster, huge perianal abscess, etc. Its compound medicine has also received good results in the treatment of cancer.