Typically, any changes that occur within a woman's breasts raise concern in patients - fears usually of the possibility that unusual symptoms could be a manifestation of breast cancer. However, just as lumps in the breasts are typically associated with potential cancer, a reddish rash or lumps on the surface of the breasts are not necessarily, and they too can be a sign of cancer. So when should a problem of this kind be of concern and what other - apart from cancer - causes of reddish breast changes could there be?