Why neurodermatitis develops in individuals is not yet fully understood. It is a disorder of the immune system, which often occurs together with allergies and can be acutely worsened by them. Typical foods that can trigger such a reaction are citrus fruits, tomatoes, seafood, peanuts and cow’s milk, although in principle an allergy can exist to any food. Cosmetics, preservatives and fragrances can also play a role. In addition, other influences can irritate the skin and trigger atopic eczema such as temperature changes, dehydration and humidity. Due to the damaged skin barrier in the context of the rashes, substances that lead to allergy can enter more easily and a vicious circle can develop. Genetic factors also seem to play a role: allergies and neurodermatitis in relatives are a risk factor for developing atopic dermatitis. Psychological and social factors such as emotional stress and external stress can also trigger a neurodermatitis flare-up.