Apply iodine to the South American snake-necked turtle two to three times a day, return to the water after 15 minutes of rubbing, get more sunlight, and pay attention to the water quality. Severely rot-skinned South American snake-necked turtles will lose their nails, and the affected area will rot and expand, with a slightly rancid odor. Dry-raise the South American snake-necked turtle, wipe the affected area with iodophor for disinfection, and then apply chlortetracycline ointment. Soak in water for half an hour every day to feed and bask in the sun.

Prevention: pay more attention to the water quality, change the water frequently, and more bask in the sun.