May 30, 2018 · A rash under your breast can be caused by a number of things. Other than a heat rash, they generally fall into four categories: infections, allergies, autoimmune disorders, and cancer.
A rash under the breast usually develops when the lower breast rests against the skin below. Trapped moisture, perspiration and friction between the skin of the breast and chest wall causes an inflammatory rash called intertrigo. The affected skin can become secondarily infected with yeast, bacteria, or both.
Sep 19, 2016 · There rashes, known as interigo, tend to be pretty common in women that are overweight. Women that have very large breasts may also get these rashes under their breasts. In more severe cases of breast rash, there may be blisters on the skin. When someone has a breast rash, this area tends to become very scaly as well.4/5(251).
Jun 11, 2019 · Inflamed blood vessel under the surface of the skin that may appear as purple lines in the affected area of your skin. Deficiency of vitamin C or scurvy can result in the purple dot, spots, mark or patches on the surface of the skin.