My sister keeps getting a rash under her armpits and doesn't know what it's from. It's not fungal. She's gotten an antibiotic for it before, but it comes back. She doesn't typically wear any deoderant so I don't think it's a reaction to that. Any idea what she could use to get it to go away? Tea tree oil doesn't help.
Eta: She doesn't shave, use antiperspirant or deoderant.
No, she's switched detergents and actually makes her own now and she doesn't have the rash anywhere but her pits. I thought about heat, but it's freezing ass cold where she lives and she doesn't get hot and sweaty. lol