I completely understand your concern and I hope I am able to help you for the same.
These lesions can be allergic in the form of seborrheic eczema
or they can be pityriasis rosea
Treatment for both of these is in the form of topical application of steroids
Take oral antihistamines for itching.
You need assessment by a dermatologist
for proper guidance and treatment.
Hope it helps
Best wishes for a speedy recovery
Dr Geetika Paul