Hello
According to your description you are suffering from tenia which is a kind of fungal infection.
It is very common in rainy season
it is commonly seen due to moisture sweat.
Next Steps
I will need detailed information as well as pictures of your affected area to understand the problem better and advise you accordingly
Health Tips
avoid moisture take bath two times a day wash your clothes in warm water.
you can do direct online consultation with me so that I can advise you further treatment.
tc