The nails have a mica-like appearance. There are many types of parasites, the process of parasitism in the body is complex, and their various developmental stages are not always in the intestines, so the lesions caused are not limited to the intestines. The presence of parasites in the body causes. Most intestinal parasitic infections are always related to local hygiene conditions, living habits, health awareness, economic level and family aggregation. Natural temperatures, rainfall, and the production and living habits of the people are epidemiologically important factors. Most of them are directly transmitted. Due to bad dietary habits, such as eating raw unsterilized fruits and vegetables, drinking cold water; not washing hands before meals and after defecation, etc. can allow the eggs to enter the intestinal tract through food, water sources and eating utensils. Nails similar to mica preventive measures are as follows: 1, do not drink cold water, do not eat raw food and unclean fruits and vegetables; 2, wash your hands before and after meals, and cut your nails diligently; 3, cook the food thoroughly, especially when barbecuing or eating hot pots; 4, educate children to change the habit of eating fingers and biting their nails; 5, it is best to give the children to wear a dead-end underwear to bed to prevent them from scratching the anus; 6, wash the toys on a regular basis or scrub toys with 0.05% iodine solution; 7, strengthen the water toys, or use iodine liquid to wash toys; 7, strengthen the water supply to prevent the eggs from entering the intestinal tract. Scrub toys; 7, strengthen the management of water sources to avoid pollution of water sources; 8, do not urinate and defecate anywhere, strengthen the harmless treatment of feces, and do not use fresh feces to fertilize; 9, the rural areas should promote the harmless treatment of feces, and shoes must be worn when working in the fields; 10, strengthen the management of domestic animals, and do not raise chickens, ducks and geese in the city; 11, child-care institutions, and schools should check feces on a regular basis, and discover parasitic children as early as possible, in order to facilitate the thorough deworming of children. The following is a list of the most important things to do.