There are a number of different causes of skin inflammation of the<unk> s, the interplay of which is also significant: environmental factors such as excessive water; contact with allergens or irritants; and genetic disposition. A single catalyst is seldom responsible for the development of<unk>  in patients. Differences according to catalysts Three main factors play an essential role in the development of chronic<unk> : excessive contact with water and irritants (cumulative-toxic stress), contact with allergens, and atopic diathesis, which has a genetic component. Individual<unk>  types are identified and named according to the main catalysts involved, i.e. cumulative-toxic, contact-allergenic, or atopic<unk> . Activities that are stressful for the skin or involve repeated, excessive contact with water or skin-irritating substances at work or home can cause damage to the skin's protective abilities and increase the chances of inflammation. This also applies to prolonged wearing of protective rubber gloves and similar materials, since sweating occurs within these gloves. Disturbance of the skin's protective barrier also facilitates penetration by allergenic substances and promotes the development of contact dermatitis. Contact allergies play a very important role in the development of<unk> . If the<unk>  is subjected to repeated contact with a substance that leads to an allergy, the skin reacts with signs of inflammation. Numerous people affected by<unk>  also experience skin inflammation on their feet. Often, a contact allergy to an ingredient in shoe leather treatment may be the catalyst. Contact allergies in certain types of employment are especially problematic, particularly if the work involves the<unk> ling of allergenic materials, e.g. masonry work or hairdressing. People allergic to Balsam of Peru may experience a flare-up of<unk>  if they use or consume products that use it as an ingredient. Severe and chronic eczema qualifies as one of the most frequent occupational illnesses. Patients should therefore be referred to an occupational-dermatological specialist as soon as possible. Patients with a history of neurodermitis, hay fever, or allergic asthma often develop<unk> . These sicknesses reflect the individual's particular susceptibility or genetic predisposition to react over-sensitively to various environmental influences. This is described as atopy or atopy diathesis. Atopic diathesis is frequently accompanied by genetically conditioned problems with the skin's protective barriers, which causes a weakening of the skin's resistance against irritating substances and moisture, as well as easier penetration by allergens, which may lead to the development of contact allergies. Differences according to prevailing signs of skin illness (morphology) hyperkeratotic fissured<unk>  fingertip eczema The clinical appearance of various subtypes of<unk>  differs. The term dyshidrotic<unk>  is used to describe formations that mainly exhibit pronounced, itching blister formations, while callus and tear formations typically indicate hyperkeratotic fissured<unk> . Differences according to degree of severity and course Independent of the triggering cause or the prevailing signs of skin illness, the selection and planning of treatment options is important, since different types of illness also differ in terms of their degree of severity and the course of the illness. While light<unk>  heals relatively quickly following dermatological therapy and patient participation, more pronounced<unk>  may persist over several weeks. Severe<unk>  is characterised by consistent or recurring, extended inflammation of the skin that severely affects the patient.<unk>  is described as chronic if it lasts at least 3 months in spite of dermatological treatment, or if it recurs at least twice within a period of 12 months (relapsed) . Severe and chronic patterns of<unk>  are often resilient to treatment, making the condition extremely stressful for those affected.
Hand eczema
Xerotic eczema
Noxzema
Dermatitis repens
Phototoxic tar dermatitis
Palmoplantar keratoderma
Pachyderma
Cutaneous larva migrans