u/Full-Display-6200

29 YO, Egypt.
Yesterday, I found this weird rash on my cat’s belly near the tail area. (Pic 1&2) What could this be? She’s spayed, fully vaccinated 13 months old.
Today it looked faded with hairs growing on it. (Pic 3&4)
She’s active, playful, eats and drinks normally.
A vet is accessible but out of my city.
I can afford vet care.

I’d be thankful for your help.