Schistosomiasis is a disease caused by parasitic worms known as schistosomes. These worms live in freshwater and can enter the human body through the skin when people swim or bathe in contaminated water. Once inside, they can cause various health problems, including abdominal pain, diarrhea, and fatigue. The disease is most common in tropical and subtropical regions, particularly in parts of Africa, South America, and Southeast Asia. Preventing schistosomiasis involves improving water sanitation and avoiding contact with contaminated water. Treatment is available and usually involves medications that can effectively kill the parasites and help manage symptoms.