People can be infected with a variety of parasites, and the symptoms vary: 1, people infected with parasites more common is roundworm, roundworm larvae can cause fever, chest pain, spasmodic cough and other symptoms of pneumonia, adult worms can cause malnutrition, intermittent pain in the abdomen, anal itching and other symptoms. 2, tapeworm, tapeworm larvae migrate in the body, parasitic in the brain can cause seizures, headaches, paralysis, parasitic in the eyes can cause Hookworm larvae can cause itchy skin and rash, while adult parasites in the small intestine can cause anemia and spleen and stomach dysfunction. 4. Schistosoma, the symptoms of schistosoma are mainly hepatosplenomegaly, and in the late stage, symptoms such as giant spleen and ascites can appear. There are also various parasites such as pinworms, toxoplasma, mites, etc., which cause damage to various parts of the internal organs, nervous system and skin.