The most common form (percentage needed) of Eczema is 'Atopic Eczema' - in this case 'atopic' meaning 'of unknown origin'.
It can occur anywhere on the body, but is common on the hands, elbows, knees, face and scalp.
A variety of factors, including environmental, diet, genetic, and viral / bacterial are known to be associated with the disorder. But no direct mechanism which explains the persistent skin outbreaks has yet been found.
Since the cause is unknown, current treatments are based around relieving the symptoms rather than 'curing' the condition.
More info: NHS England
Also see :
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