Depending on the type of parasites, they may cause skin discomfort, suck nutrients from the human body and cause deformities in babies. 1. Causing skin discomfort: various mites, lice, fleas and other parasites that live on the surface of human skin may cause itching, pain, inflammation and other discomfort. 2. Absorb human nutrition: there are internal parasites, such as tapeworms, roundworms, pinworms, etc., parasites in the body, absorb human nutrition, easily lead to gastrointestinal discomfort, anemia, emaciation, etc., and may also cause harm to the liver, spleen and other organs. 3. To infant deformity: these parasites can cause infant deformity, physical disability, or even death, such as toxoplasmosis, schistosomiasis, schistosomiasis, etc.. Parasites are harmful to the human body, if you are not feeling well, you should go to the hospital in time for examination and treatment for different types of parasites.