Thanks for posting your query.
From the description provided, it seems to be nummular eczema
that you are getting.
The best treatment for it would be application of a combination of steroid and antibiotic combination cream called mometasone
and fusidic acid
cream. It will require a prescription.
However, it would be best to consult your dermatologist
as its always better to examine the lesions and then diagnose it.