There is no consensus on what the cause is for of the collection of symptoms referred to as eczema. There is no lack of speculation though. It’s either ‘genetic’, a nutritional deficiency, due to ‘food allergies’ or some variant of immunologic disorder. Or, all of the above plus a lot more.
The symptoms are real though, causing a great deal of distress. Childhood eczema is quite common, though the symptoms often reemerge later in life.
While there are various tests that might be employed, the Mayo Clinic states flatly “No lab test is needed to identify atopic dermatitis (eczema)”. Depending on the point of view, the range of treatments is very extensive. Some though stands out as showing