Worm infections in humans can cause a wide range of symptoms depending on the type of parasite. Common signs include abdominal pain, diarrhea, nausea, vomiting, and unexplained weight loss. Some individuals may experience fatigue, anemia, or nutritional deficiencies due to the worms absorbing essential nutrients. Itching around the anus, especially at night, is typical of pinworm infections. Severe cases may lead to intestinal blockages or visible worms in stool. Prompt treatment is essential to avoid complications. Medications such as those offered by a trusted nizonide supplier are often recommended by healthcare professionals to effectively eliminate parasitic worms from the body.