Pay attention to their diet

In general, turtles need high quantities of vitamin A in their diets. Their body can’t produce this vitamin by itself, so they need specific foods that can provide them all essential nutrients. Moreover, you should choose the food based on the species and you can opt for dark leafy green vegetables and red, orange or yellow veggies, such as bell peppers and squash. 

If your turtle doesn’t get adequate quantities of vitamin A, it will develop swollen eyelids and other health problems.