Brief Answer:
if both breasts involved not likely
Detailed Answer:
Hi, thanks for using healthcare magic
There is a condition called pagets disease of the breast where a
rash around the nipple is associated with underlying cancer of the breast, usually intraductal cancer which is cancer involving the ducts or passages in the breast.
It would occur in one breast only in the vast majority of cases, it would be very rare to have bilateral cancer in both breast.
If the rash involves both breasts then it is very unlikely that there is any risk of cancer with it, it may be related to the area being irritated by a the material of the bras, soap used , detergent or any cream used in this area.
This would be treated by avoiding the allergen if known and using a mild
steroid cream.
If it involves only one breast then though it may most likely not be cancer related, it would be best to see your doctor who may suggest a
mammogram.This type of cancer is rare however , only 1% to 4 % of breast cancers are associated with a rash.
Summary: (1) if it involves both breasts, then cancer is very unlikely
(2)if it involves only one breast then though cancer is still not likely, you may want to consider visiting your doctor for an assessment
I hope this helps, feel free to ask any other questions