The manifestations of children with roundworms include abdominal pain, allergy and loss of appetite. 1. Abdominal pain: when children have roundworms, they will have paroxysmal abdominal pain, and the site of abdominal pain is around the navel or in the upper abdomen. 2. Allergy: the worms can easily cause the body to produce allergic reactions, which can be repeated hives, conjunctivitis and so on. 3. Loss of appetite: when children have roundworms, they show poor appetite or severe partiality, some children are easily hungry and eat a lot, but they are very thin and yellowish, sometimes there is anemia and growth retardation. Children with roundworms may also have other manifestations, it is recommended to go to the hospital in a timely manner, improve the examination to clarify the cause of the disease, and then give targeted treatment or treatment.