Dermatology Questions? Ask an Online Dermatologist.
This is Dr. David
this sounds like it could be from eczema or from a viral infection
can you upload a clear jpg photo of his rash so I can better help you?
does he have a fever?
has he had chicken pox before?
he can get blood test to check for chicken pox infection.
he should see a doctor and get blood test to check for elevated WBC count and infection.
he may need hydrocortisone cream to help decrease itchiness.
milk baths or calamine lotion could help.
most skin rashes are caused by viral infections
and many causes of rashes are not found.
rash can often be a cutaneous manifestation of internal inflammation.
just a viral infection internally can cause a skin rash.
most rashes over time go away on their own.
that is good you have the itch under control
that is good he has no fever.
is he able to sleep through the night?
steroids should always be taken with food in the stomach.
some viral infections may not cause fever.
it may take 1-2 weeks to go away
4 months is a long time
yes, he should see an allergy doctor and get skin allergy testing.
and see if anti-histamines like benadryl, allegra, claritin can help his symptoms.
I think he should see an allergy specialist
take him to a dermatologist. I think that will prove to be less fruitful.