You seem to have developed lesions of pityriasis rosea
It presents with oval round lesions especially over the trunk lesions. Most of the lesions are small but there is always one prominent big oval lesion.
It is a self limiting disease with new lesions appearing every few days. May take turn two months for complete recovery.
You may apply rod topical steroid
if you have itching.
See a nearby dermatologist
for confirmation of diagnosis and further management.
Dr Geetika Paul