Breast cancer is cancer that forms in the cells of the breasts.

Symptoms: Nipple changes

Signs and symptoms may include:

• A breast lump or thickening that feels different from the surrounding tissue.
• Change in the size, shape or appearance of a breast.
• Changes to the skin over the breast, such as dimpling.
• A newly inverted nipple.
• Peeling, scaling, crusting or flaking of the pigmented area of skin surrounding the nipple (areola) or breast skin.
• Redness or pitting of the skin over your breast, like the skin of an orange.

Factors that are associated with an increased risk of this type of cancer include: Being female. Women are much more likely than men are to develop this cancer. Increasing age. Your risk of cancer increases as you age.

A personal history of breast conditions. If you’ve had a breast biopsy that found lobular carcinoma in situ (LCIS) or atypical hyperplasia of the breast, you have an increased risk of breast cancer.

A personal history of this cancer. If you’ve had breast cancer in one breast, you have an increased risk of developing cancer in the other breast.

A Family History. If your mother, sister or daughter was diagnosed, particularly at a young age, your risk of breast cancer is increased. Still, the majority of people diagnosed with breast cancer have no family history of the disease.

Inherited genes that increase cancer risk. Certain gene mutations that increase the risk of this cancer can be passed from parents to children. The most well-known gene mutations are referred to as BRCA1 and BRCA2. These genes can greatly increase your risk of this cancer and other cancers, but they don’t make cancer inevitable.

Radiation exposure. If you received radiation treatments to your chest as a child or young adult, your risk of this cancer is increased.

Obesity. Being obese increases your risk.

Beginning your period at a younger age. Beginning your period before age 12 increases your risk.

Beginning menopause at an older age. If you began menopause at an older age, you’re more likely to develop this cancer.

Having your first child at an older age. Women who give birth to their first child after age 30 may have an increased risk of this cancer.

Having never been pregnant. Women who have never been pregnant have a greater risk of breast cancer than those women who have had one or more pregnancies.

Postmenopausal hormone therapy. Women who take hormone therapy medications that combine estrogen and progesterone to treat the signs and symptoms of menopause have an increased risk of this cancer. The risk of this cancer decreases when women stop taking these medications.

Drinking alcohol. Drinking alcohol increases the risk of this cancer.