heat rash
Curel has a lotion specifically created to help with itchy skin. It is called Curel Itch Defense. Gold Bonds is also a good brand to help with itchy skin.
frostbite
frostbite
frostbite
frostbite
frostbite
It's possible that your skin cells in that area have stop producing melanin. The condition is called vitiligo
Generally, skin does not typically turn black. Exceptions would be injury or exposure to extreme cold that interferes with proper blood flow.
Some symptoms of an autoimmune disease are extreme fatigue, inflammation, persistent fever, swollen glands, changes in weight and itchy skin or skin rashes.
Allergies
if you turtle had itchy skin. i would recomend taking it to a vet . it might be something serious or maybe just a infection or dry skin or a rash
Vitamins C, E, and the B vitamin Biotin have been shown to improve skin health. C and E reduce the effects of sun exposure and Biotin is a necessary nutrient that forms the basis of skin and hair (inadequate amounts can cause itchy skin and hair-loss).