Hello,
Welcome to HCM,
I have reviewed your history and understand your concern.
It can be several things leading to your symptoms as there are at least a couple of common things that could be causing the
rash.
One possibility is that this is a yeast infection of the skin. These are relatively common on the breasts because the yeast grows best in humid environments.
These
fungal infection can spread to other areas also through the fomites.
The other common condition would be
allergic reaction, which could be from clothing, soap or other chemicals, or another exposure.
Both conditions can be quite itching, so that doesn't necessarily help differentiate between them.
I would suggest you to consult your doctor because he will be able to tell what is the reason for the rash.
If this is a yeast infection, then a topical
anti-fungal medication will be prescribe by your doctor
If it is an allergic reaction, then you may need a
topical steroid cream to get the inflammation under control.
Hope you got the answer for your query.
Thank you.