Lichen Simplex

Neurodermatitis, also known as lichen simplex, is a chronic form of dermatitis. Chronic itching and scratching can cause the skin to thicken and have a leather texture. Neurodermatitis results in a constant scratch-itch cycle. Although signs increase in times of stress, changes in the nerve fibers are also present.
A scratch-itch cycle happens when a small itch causes scratching which increases the itch, leading to more scratching. The cause of the itch can be anything - an insect bite, tight clothing or dry skin. Neurodermatitis appears as scaly patches of skin on the head, lower legs, wrists, or forearms caused by a localized itch (such as an insect bite) that becomes intensely irritated when scratched The skin then can become very irritated when scratched over and over. Stress and tension increase the itching. This results in the scratching process turning into a habit that we do without thinking. Things in your environment can also cause itching. There may be a family history of asthma, hay fever, eczema, psoriasis or other skin disorders.