Ascariasis will show different systemic symptoms, the lungs will have a cough, there will be abdominal pain in the digestive tract, and an allergic reaction will lead to breathing difficulties. 1. Lung symptoms: the lungs will have a persistent cough, coughing up sputum, and sputum with blood in it, and there will be chest pain, wheezing and so on. 2. Gastrointestinal related symptoms: abdominal pain, nausea, vomiting, bloody stools, etc. may occur. With the further progress of the disease, there will be weight loss and malnutrition, vomiting, and some patients can see roundworms in the vomit and feces. 3. Allergic reaction: the metabolites of roundworms can cause allergic reaction in some people, such as asthma, which manifests as difficulty in breathing and coughing, and urticaria, which manifests as itchy and clammy skin. 4. Neurological symptoms: If the condition is serious, children may have epilepsy, coma and other symptoms. 5. Systemic symptoms: fatigue, chills and fever. If the above symptoms occur, it is recommended to consult a doctor in time, and actively treat under the guidance of the doctor, so as to avoid further aggravation of the condition.