Parasitic worm infections can cause a wide range of symptoms depending on the type of worm and the severity of infection. Common symptoms include abdominal pain, diarrhea, nausea, vomiting, bloating, and unexplained weight loss. Some people experience fatigue, anemia, itching around the anus, or visible worms in stool. In more severe cases, parasitic worms may cause malnutrition, vitamin deficiencies, coughing, or breathing difficulties if larvae migrate through the lungs. Skin rashes and muscle pain can also occur. Early diagnosis is important, and medications are widely available through regulated channels, including nizonide wholesale suppliers for clinical use.