Breast cancer is one of the most common cancers diagnosed in women, with about 1 in 8 women in the United States developing invasive breast cancer during their lifetime1. While many breast cancers are detected through routine screening, some people experience noticeable symptoms or changes in their breasts that may indicate cancer deaths2. Understanding these symptoms can lead to earlier diagnosis and better treatment outcomes3.
Breast Lumps and Thickening
The most common symptom of breast cancer is a new lump or mass in the breast or under the arm2. A breast lump is a mass or tumor that forms when cancer cells multiply, but it is important to note that most breast lumps are benign and not cancerous4. Cancerous lumps often have distinct features: they may be hard to the touch, have irregular shapes and rough edges, and are usually stable and do not move easily during a breast exam4. These lumps can be found anywhere on the breast, near the nipple, or under the armpit, with the upper-outer part of the breast near the armpit being the most common location for cancerous lumps4.
Breast lumps can vary in texture and tenderness; cancerous lumps may be soft or hard and can be painless or tender4. Many women report that their breasts normally feel lumpy or uneven, which can be influenced by hormonal changes, pregnancy, weight fluctuations, or medications5. Therefore, any new lump or thickening that feels different from the surrounding tissue should be evaluated by a healthcare provider3.
- Most breast lumps are caused by benign conditions such as fibrocystic breast changes or cysts5.
- Fibrocystic breast condition causes noncancerous changes that make breasts lumpy, tender, and sore5.
- Cysts are small fluid-filled sacs that can develop in the breast and are usually benign5.
- A painless, hard lump with irregular edges is more likely to be cancerous3.
- Early detection of lumps through self-exams or mammograms improves treatment success3.
Different people have different symptoms of breast cancer. Some people do not have any signs or symptoms at all. Being familiar with how your breasts normally look and feel is an important part of breast health.5
Changes in Breast Skin
Breast cancer can cause various changes in the skin covering the breast. These changes may include thickening, swelling, dimpling, redness, rash, and puckering4. The skin may take on a texture similar to an orange peel, known as peau d'orange, which is a classic sign of breast cancer4. Inflammation of the skin can appear pink in lighter skin tones and dark red or maroon in darker skin tones4. A rash causing dry, rough, or flaky skin on the breast may also be associated with breast cancer4.
These skin changes occur because cancer cells can block lymph vessels or invade the skin, leading to swelling and irritation2. Inflammatory breast cancer, a rare but aggressive form, often presents with redness, swelling, and warmth without a distinct lump2.
- Skin thickening or swelling around the breast can be a warning sign of breast cancer4.
- Dimpling or puckering of the skin makes it look dented or uneven4.
- Redness or rash may cause the skin to appear dry, flaky, or irritated4.
- Changes in skin color or texture should prompt medical evaluation2.
- Skin changes may be more noticeable in certain skin tones and can vary widely4.
Nipple Changes and Discharge
Changes in the nipple can be an important warning sign of breast cancer. These changes may include nipple discharge, inversion (turning inward), dryness, or flakiness of the areola4. Nipple discharge can vary in appearance and may be milky, watery, thick, thin, brown, clear, or bloody4. Bloody nipple discharge is particularly concerning and should be evaluated promptly6.
Nipple inversion occurs when the nipple turns inward instead of pointing outward, which can happen as cancer spreads and pulls on the tissue4. Dryness or flaking of the nipple skin may also be associated with cancer, especially if it is persistent and accompanied by other symptoms4.
- Nipple discharge other than breast milk, including blood, can be a sign of breast cancer7.
- Nipple inversion or retraction should be reported to a healthcare provider3.
- Dryness, scaling, or crusting of the nipple skin may indicate underlying cancer2.
- Changes in nipple appearance often occur alongside other breast changes2.
- Persistent nipple pain or discomfort warrants medical evaluation5.
Alterations in Breast Shape
Sudden changes in the shape or size of the breast can be warning signs of breast cancer. These changes may include swelling, shrinking, or loss of symmetry between the breasts4. Breast cancer can cause one breast to become visibly larger or smaller than the other, which may be due to tumor growth or inflammation2.
Because males have lower estrogen levels, changes in breast size or shape are less common in male breast cancer4. However, in females, any significant or sudden alteration in breast appearance should be assessed by a healthcare provider4.
- Sudden swelling or shrinking of the breast may indicate cancer4.
- Changes in breast symmetry, where one breast looks different from the other, can be a sign4.
- Significant changes in breast size or shape should be promptly evaluated4.
- Breast shape changes may be accompanied by skin or nipple changes2.
- Not all breast shape changes are cancerous but require medical assessment3.
Symptoms of Metastatic Cancer
Metastatic breast cancer occurs when cancer spreads beyond the breast to other parts of the body, typically diagnosed at stage 44. Symptoms vary depending on the organs affected. Common signs include chest, joint, or bone pain, numbness, and a chronic or dry cough4. These symptoms arise because cancer cells invade tissues such as bones, lungs, or nerves8.
Other possible symptoms of metastatic breast cancer include swelling of lymph nodes, fatigue, and neurological changes if the brain or spinal cord is involved2. Early recognition of these symptoms can help guide appropriate treatment and supportive care.
- Chest, joint, or bone pain may indicate spread to bones or chest wall4.
- Numbness can occur if nerves are affected by metastatic cancer4.
- A chronic or dry cough may signal lung involvement4.
- Symptoms depend on the location of metastases and may vary widely2.
- Some patients may have no symptoms despite metastatic disease2.
Metastatic breast cancer symptoms depend on where the cancer has spread. Sometimes, metastatic disease may not cause any symptoms, highlighting the importance of regular follow-up and monitoring.2
Male Breast Cancer Signs
Breast cancer in males is rare, accounting for less than 1% of all breast cancer cases4. Despite its rarity, male breast cancer presents with symptoms similar to those in females, except that changes in breast size and shape are uncommon due to lower estrogen levels in males4. Men may notice lumps in the breast, thickening, or changes to the nipple or breast skin such as dimpling, puckering, or redness2.
Nipple discharge in males can also occur and should be evaluated promptly2. Awareness of these signs is important since male breast cancer is often diagnosed at a later stage due to lack of awareness.
- Male breast cancer symptoms include painless lumps or thickening in the breast4.
- Changes in nipple or breast skin, such as dimpling or redness, can occur4.
- Nipple discharge in males is a warning sign and requires medical evaluation2.
- Changes in breast size or shape are less common in males4.
- Early detection improves outcomes in male breast cancer2.
When to Consult a Doctor
Any new changes in the breasts or symptoms should prompt a visit to a healthcare provider for evaluation4. Women over 40 are at higher risk for breast cancer and should be especially vigilant about breast changes4. Early testing, including mammograms, ultrasounds, or biopsies, can lead to early diagnosis and better treatment options4.
It is important to remember that many breast symptoms can be caused by benign conditions, but timely assessment is crucial to rule out cancer3. If you feel nervous about visiting a clinic, bringing a loved one can provide support4.
- Report any new breast lumps, thickening, or changes in skin or nipple appearance4.
- Women over 40 should have regular breast screenings and report changes promptly4.
- Early diagnosis improves treatment success and survival rates3.
- Healthcare providers may use imaging and biopsy to confirm diagnosis4.
- Support from family or friends can help ease anxiety about medical visits4.
