1. Unusual Lump or Thickening in the Breast or Underarm

One of the most well-known signs of breast cancer is the development of a lump or mass in the breast. While not all lumps are cancerous, it's important to have any new or unusual lumps checked by a healthcare provider. Breast cancer lumps tend to be hard, irregular in shape, and painless, but they can also be tender or painful. Lumps may also appear in the armpit, where breast tissue extends.

2. Changes in Breast Size or Shape

Sudden or noticeable changes in the size or shape of the breast could be an early sign of breast cancer. If one breast becomes significantly larger or appears swollen compared to the other, it's worth paying attention to. These changes might occur without any obvious lumps and can signal the presence of a tumor.

3. Nipple Discharge or Inversion

Unusual nipple discharge—especially if it’s clear, bloody, or occurs without squeezing—can be a warning sign of breast cancer. While most nipple discharge is harmless, particularly when associated with breastfeeding or infection, any unexpected discharge should be evaluated by a doctor. In some cases, the nipple may also become inverted or retracted, which can indicate underlying issues.

4. Changes in the Skin of the Breast

Changes in the skin covering the breast, such as dimpling, puckering, or the appearance of redness or rash, can be early warning signs of breast cancer. These changes might give the skin a texture similar to an orange peel (called “peau d’orange”). Skin changes are often a result of underlying tumor growth that affects the skin’s structure and should not be ignored.

5. Persistent Breast or Nipple Pain

While breast pain is not typically the first sign of breast cancer, persistent or unexplained pain in the breast or nipple area can be an early warning sign. This pain may not be related to the menstrual cycle or other common causes like infection. If the pain doesn’t go away or worsens over time, it’s important to have it evaluated.