Try gradually changing the food over to something like avoderm which has avocado for skin and coat, or mix fish oil in with the food which you can get at like Petco.
It's because of the hair rubbing against his skin.
You will see white flakes of skin in your hair, and your scalp will likely be itchy...
My cat has an itchy skin condition, and the vet suggested we give him "advantage", assuming he has an allergy to fleas, ect... it works, he doesnt itch, or scratch and his hair has grown back!
Laser hair removal can cause itchy skin at the treated area as well as pink or red skin. Laser hair removal can also cause swelling, acne, and white spots referred to as hypopigmentation.
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).
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
Allergy?
Irritation
yes
yes
of your crack