Once ascaris eggs enter the human body, they will do harm to the human body in the whole process of their development and maturity. First of all, in the process of human travel, if the larvae go astray, they can cause various ectopic injuries, such as blindness caused by moving to the eyeball, hepatomegaly caused by moving to the liver, meningitis, epilepsy, urine abnormality caused by straying into the brain, kidney and thyroid, or inflammation of corresponding organs. If you eat a large number of infectious eggs in a short time, when they molt into larvae, they can cause ascaris acidophilus pneumonia when they reach the lungs. Adults live in intestinal tract, which can cause digestive tract dysfunction, such as abdominal pain, loss of appetite and diarrhea, due to the mechanical stimulation of worms themselves and the toxins and metabolites secreted by worms. Once you have a fever or vomit, you can vomit ascaris. Ascaris can also crawl out of nostrils or anus or be excreted with feces. When ascaris lumbricoides is seriously infected, it can make children malnourished, mentally retarded, backward in development, sometimes manifested as irritability, insomnia, grinding teeth, and even convulsions, which seriously affects children's health and growth, and sometimes causes allergic reactions (such as intractable urticaria). Ascaris has the habit of drilling holes. When ascaris lumbricoides is subjected to various stimuli (such as high fever, indigestion, improper deworming, etc.). ), it will cause commotion and complications of ascaris. The most common is biliary ascaris. Ascaris burrows into the biliary tract, causing severe colic in the upper abdomen, making patients cry, roll around and break out in a cold sweat. Secondly, ascaris appendicitis can also occur, suddenly abdominal pain, and then gradually turn into colic in the right lower abdomen. When the pain is relieved, sometimes the ascaris cord can be touched at the appendix. If it continues to develop, the appendix will be necrotic and perforated to form ascaris peritonitis. Ascaris will block the intestine and cause ascaris intestinal obstruction. If not treated promptly and effectively, intestinal necrosis and peritonitis will occur. In addition, when Ascaris patients are in a coma or use a lot of sedatives, Ascaris can crawl into the trachea from the pharynx, causing suffocation. When drilling into other organs (such as liver and pancreas), abscess or inflammation will occur. Therefore, don't underestimate the ascaris lumbricoides, which can also cause great disasters and endanger people's lives.