Small Red Pimple On Breast. When infected the bump turns white as it is filled with pus. Pimples under the breasts typically caused by sweating friction or tight clothing can be bothersome and even embarrassing 2.

Than I have a mark that looks kind of like a blackhead closer to my nipple its a little tiny bit darker than the color. Waiting for the pimples to go away is one option. Red pimples or acne bumps on the breast whether they are large or small may be sources of worry.
Many breast lumps turn out to be caused by fibrosis or cysts which are non-cancerous changes in breast tissue.
The skin on your breasts is thicker than on your face which makes these blemishes somewhat more difficult to treat. Dead skin cells may become trapped in the pores and the presence of dirt oil and bacteria. A red pimple on breast. While inflammatory breast cancer IBC can begin with what appears to be a small red pimple this type of breast cancer is very rare.