Checking whether there are parasites in the body can be done by checking the blood routine, checking the stool, gastroscopy or colonoscopy. 1. Blood test: mainly check whether the eosinophils are increased. If there are parasites in the body, blood eosinophils will be obviously increased. 2. Check stool: by checking whether there are worm eggs in stool, you can accurately determine whether you are infected with parasites. For example, roundworm eggs, liver fluke eggs and schistosoma eggs can be found in the feces. 3. Gastroscopy or colonoscopy: Through gastroscopy and colonoscopy, parasites or damage caused by parasites can be found in the intestines. Ultrasound and retrograde cholangiopancreatography are also generally helpful in detecting parasitic lesions in the biliary tract and pancreas. If there are symptoms such as increased food intake, weight loss, abdominal pain, teeth grinding at night, perianal itching, etc., it is recommended to consult a regular hospital in time to improve further examination, in order to make a clear diagnosis and early treatment, so as to avoid delaying the condition.