Causes

The cause of neurodermatitis is unknown. The persistent rubbing and scratching that characterize the condition may begin with something that simply irritates the skin, such as tight clothing or a bug bite. As you rub or scratch the area, it gets itchier. The more you scratch, the more it itches.

In some cases, neurodermatitis is associated with chronic skin conditions — such as dry skin, eczema or psoriasis. Stress and anxiety can trigger itching too.