Welcome to healthcare magic.
It could be a fungal infection
).Without an opportunity to closely examine the lesion, I would not be able to accurately tell. You might need to consider a consultation with dermatologist
For ring worm antifungal cream like miconazole
2 % twice a day for two to three weeks will work. It is alright to show your parents, they will be able to identify ring worm some times.
Hope this helped