The cactus can treat mumps, the treatment method is to mash or cut into thin slices, applied externally to the swollen parts of the parotid gland, usually 2-3 hours a day, the cactus can achieve the purpose of effective swelling and pain relief, mumps pain will often subside within a few days, the local can also play a cooling and analgesic effect. The cactus is best used fresh, dry is unlikely to achieve results, this is also a more commonly used in the folklore of a method, and officially written into the textbook of Chinese medicine pediatrics. The actual fact is that there is no clear-cut effect of topical application of cactus to treat mumps, but there is no particularly effective way to reduce swelling and pain in Western medicine, and the application of cactus or the application of other herbs can have the effect of reducing swelling and pain.