Welcome to HCM.
with little history, it seems that lesions you have would be tinea corporis
Also called ringworm infection.
It is fungal infection
Clinically easy to diagnose.
Other skin diseases which look alike should be kept in mind.
Therefore , you consult dermatologist
for perfect diagnosis..
KOH scrapping for fungus test would confirm or rule out ringworm infection..
Anti fungal tablets and cream would be the best treatment.
Avoid soap, which may exacerbate the disease.
I hope you got my answer.
Dr. Ilyas Patel MD