Pinworms in children can be self-tested by gastrointestinal symptoms, skin symptoms, and itching around the anus or perineum. If you have the above symptoms, you need to be alert to pinworm infection, but the specific diagnosis should be timely medical care, improve the stool routine, as well as stool to find eggs and other related tests. 1. Digestive symptoms self-test: pinworm infection may appear loss of appetite, diarrhea, abdominal pain and other symptoms, mostly due to pinworms in the gastrointestinal tract caused by mechanical stimulation, chemical stimulation. 2. Skin symptoms:Pinworm-infected babies can have itchy skin, or even eczema and other rashes. 3. Itching:Pinworm infection may occur at night perianal or perineal itching, is the pinworms crawl out of the anus at night to lay eggs caused. If you have the above symptoms, you should consult a doctor in time, improve the stool routine, and stool to find eggs and other related examinations, a clear diagnosis and then follow the doctor’s instructions for treatment, do not unauthorized use of medication, in order to avoid danger.