Parasite infection in the body can be characterized by large meals, weight loss, teeth grinding in bed, anal itching, and the presence of eggs or adult worms in the stool. 1. Large amount of meals and weight loss: the amount of meals increases gradually, but you always feel hungry and lose weight. When there are parasites attached to the body, the parasites are consuming the nutrients ingested by the body. Although the body normally ingests all kinds of food, the heat and nutrients are secretly seized by the parasites, resulting in the symptoms of easy hunger and weight loss. 2. Grinding teeth in sleep: If you have never had the habit of grinding your teeth and one day suddenly start grinding your teeth, you are likely to be infected with pinworms. The toxins released by pinworms can cause pseudo-anxiety, further causing symptoms of nighttime teeth grinding. 3. Anal itching: Pinworms are used to laying eggs near the anus at night, so the symptoms of anal itching at night will occur after infection with pinworms. 4. Eggs or adult worms in the stool: After infection with parasites, sometimes the eggs or adult worms of the parasites will be excreted with the stool. There are many other symptoms of parasite infection, such as abdominal pain, bloating, anemia, etc. If you suspect that you are infected with parasites, it is recommended that you go to the hospital for a routine stool test, and if it is positive, follow the doctor’s instructions to carry out deworming treatment to improve the above mentioned uncomfortable symptoms.