Symptoms are usually listlessness accompanied by weight loss and abdominal stress. If their presence is suspected, consult a veterinarian immediately. Another common problem is a vitamin deficiency. Symptoms of vitamin A deficiencies include swollen eyelids and nasal discharge, and can be prevented by providing the recommended diet. Turtles are easily overdosed on fat-soluble vitamins so these should be avoided unless prescribed by a veterinarian.
Sunken eyes suggest dehydration.
Swollen body tissues and pasty or liquid feces indicate malnutrition or infection. Prolonged inactivity or tendency to keep the eyes closed may also suggest a health problem, although turtles are normally inactive during winter hibernation or dry summer aestivation. Sick turtles often refuse to eat and become emaciated. A turtle should be referred to a veterinarian if it seems abnormally light, indicating dehydration or emaciation, or too heavy, which may indicate large bladder stones. The legs and head should appear symmetrical and bones should not be too prominent.