Children who do not absorb their meals and are thin may be related to genetic factors, hyperthyroidism, intestinal parasites, etc. They can usually be treated with anti-thyroid medication and deworming therapy to regulate their condition. 1. Genetic factors: If the parents of a child are thin and underweight, the thinness of the child may be due to genetic factors, and the diet should be adjusted to improve appetite. 2. Hyperthyroidism: children with hyperthyroidism will have a thin body that does not absorb food. This is usually due to high consumption and lack of fat accumulation, and even weight loss. Children can usually be treated with anti-thyroid medications, such as propylthiouracil and methimazole. 3. Intestinal parasitism: After infection with parasites, the nutrients in food cannot be fully absorbed by the intestines, so the child will have to eat without absorbing the body thin. Usually can be given for the parasite species deworming treatment, such as tapeworm infection, you can choose praziquantel, clonidine and other drugs; if the hookworm infection, you can choose mebendazole, bis(hydroxynaphthyl)thiopyrimidine and other drugs. It should be noted that people who are allergic to any of the components of the above drugs are prohibited from using the drug. If the child is not absorbing the body to eat thin, it is recommended to go to the hospital in a timely manner, to clarify the cause of the disease, standardized treatment, so as not to delay the condition.