Neurodermatitis

Neurodermatitis is similar to atopic dermatitis. It causes thick, scaly patches to appear on your skin. 

Symptoms
 
In neurodermatitis:
 Thick, scaly patches form on your arms, legs, back of your neck, scalp, bottoms of your feet, backs of your hands, or genitals.
 The patches can be very itchy, especially when you’re relaxed or asleep.
The patches can bleed and get infected if you scratch them.
 
Causes Neurodermatitis usually starts in people who have other types of eczema or psoriasis. Doctors don’t know exactly what causes it, but stress can be a trigger.