vasaline will only make the surface wet, i have had this problem on several occassions, usually to to warmth around breast area, hence sweat rash. i use a small ammount of baby powder, it does the trick every time. hope this helps
Don't worry
If you tend to get hot during the day your breast will swaet causing a rash . At night dont sleep wit a bra on. Go and get antibaterial soap and take a face cloth wash in between and let dry . Your rash should go away. You can even use peroxide as well
Do you have any pets? Scabies can be transmitted from your pets. I thought of that first because I have worked in veterinary medicine for 11+ years. The other thought is a yeast infection...yes, you can get them there! You may want to try miconazole or another type of over the counter yeast infection creme like Vagisyl. Your doctor would obviously be the best bet. Good luck.