Parasitic worm infections can cause a wide range of symptoms depending on the species and infection severity. Common signs include abdominal pain, diarrhea, nausea, bloating, unexplained weight loss, anemia, and fatigue. Some individuals experience itching around the anus, coughing, wheezing, or visible worms in stool. Chronic infections may lead to malnutrition, vitamin deficiencies, growth delays in children, and weakened immunity. In severe cases, worms can affect the liver, lungs, or intestines, causing obstruction or inflammation. Early diagnosis and treatment are important, and access to medications through a reliable nitazoxanide wholesaler supports effective management and prevention of recurrent parasitic disease globally.