Thanks for writing in.
The rash you are describing can be furuncle,impetigo, contact dermatitis
Keep the area clean and dry.You can apply neosporin
ointment over the area.
Also you can take Mega CV antibiotic it is safe.Furuncle and impetigo will be cleared from mega CV.
You can apply calamine lotion over the area.Also you can take tab paracetamol
for pain .
Visit a qualified dermatologist
for proper diagnosis and treatment.
Hope this helps.