Parasitic worm infections can present various symptoms depending on the type of parasite. Common signs include abdominal pain, diarrhea, fatigue, nausea, weight loss, and unexplained itching, particularly around the anus in cases like pinworms. Other symptoms may include bloating, vomiting, and signs of nutrient deficiencies. For treatment, Nizonide 500mg (Nitazoxanide) is often prescribed as an effective antiparasitic medication. It helps combat infections such as giardiasis, cryptosporidiosis, and other parasitic infestations. Early recognition of symptoms and consultation with a healthcare professional are crucial to receiving appropriate treatment and avoiding complications. Always follow medical advice for dosage and duration of treatment.