Welcome to HCM,
For your this complain you have to consult Dermatologist
and you have consulted.
It seems that you might have dermatitis
or some fungal infection
super-added with bacterial infection.
Clean the part with antiseptic lotion and apply triple action cream.
Take antihistamine like Cetriziine for itching.
As itching will stop, lesion at local site will be dried up giving you relief.
Go for one antibiotic medicine course after consulting your doctor.
Ok and bye.