The danger of parasites to human beings mainly includes taking away nutrients, mechanical damage, toxic effects and so on. 1. Nutritional seizure: parasites in the host’s body, after a large number of reproduction in the body will absorb a large number of nutrients, resulting in malnutrition of the host, prone to anemia and other conditions. 2. Mechanical damage: parasites in the body for a long time may be twisted into a mass, resulting in intestinal obstruction; may also compress the liver, spleen and other abdominal organs, affecting the normal physiological function of the organs. 3. Toxic effects: the secretion and excretion of the parasite will have toxic effects on the host, which may induce liver abscess and systemic allergic reactions. Parasitization in the skull can cause intracranial infections, which are life-threatening. Parasites may also cause other harm to the person. It is recommended to seek medical attention as soon as possible in the event of a parasitic infection.