This is a common condition which is thought to be due to a viral infection. Patients develop a widespread , slightly scaly rash which can look like either eczema
The clue to this condition is the fact that it tends to appear initially as just one or two inflamed patches somewhere on the skin which lasts for about two weeks before the rest of the skin becomes involved with the rash.
The body is involved more often than the arms and legs. Usually this condition is self-limiting and gradually fades away over the period of about 2-3 months. Simple moisturisers or weak topical steroids are sometimes helpful if the condition is itchy.
A diagnosis often unrecognised by family doctors but actually very common - an consultation with a Consultant Dermatologist can clarify the situation. You can use 'consult the specialist'