There are many possible symptoms of parasitic infections, the common ones are coughing, abdominal pain and vomiting 1. When a parasitic infection invades the lungs, it can lead to lung damage. Patients may show coughing, coughing up sputum, blood in the sputum, and X-rays may show wandering shadows in the lungs. 2. When the parasitic infection invades the brain, eosinophilic meningitis can appear, which is caused by the infection of Guangzhou tubular nematode. Due to the stimulation of inflammation, its symptoms manifest as headache, nausea and vomiting. 3. When parasites invade the gastrointestinal tract, such as infection with roundworms, they can absorb intestinal nutrients from patients leading to malnutrition, or block the intestinal tract leading to intestinal obstruction and abdominal pain, vomiting and nausea. In addition, parasitic infections can also appear other symptoms, it is recommended that patients go to the hospital in a timely manner, do the relevant examination, to clarify the cause of the disease and then follow the doctor’s instructions for treatment, to avoid delaying the condition.