Breast cancer: Warning signs you should never ignore

Breast cancer remains an important public health concern, making awareness of its warning signs essential for early detection and timely treatment.

The disease occurs when abnormal cells in the breast grow uncontrollably and may spread to other parts of the body if left untreated. Although breast cancer is more common in women, men can also develop the disease.

Recognising changes in the breast and seeking medical attention promptly can help improve the chances of detecting the disease at an earlier stage.

However, not every breast change indicates cancer. Some symptoms may result from infections, hormonal changes, cysts or other non-cancerous conditions. Medical assessment is therefore important whenever an unusual or persistent change occurs.

1. A lump in the breast or underarm

One of the most widely recognised warning signs of breast cancer is a new lump in the breast or underarm area.

A breast lump may feel hard, irregular or different from the surrounding tissue. However, cancerous lumps can also be soft, tender or difficult to feel.

Some lumps are painless, which means the absence of pain should not be taken as reassurance that a lump is harmless.

Although many breast lumps are non-cancerous, anyone who discovers a new lump should seek medical assessment rather than attempting to determine its nature through touch alone.

2. Changes in breast size or shape

A noticeable change in the size, shape or appearance of one breast may be another warning sign.

Although it is normal for breasts to differ slightly in size, a new or unexplained difference deserves attention, particularly when accompanied by swelling, skin changes or a lump.

Some breast cancers can cause swelling or alter the breast’s overall appearance even when no distinct lump can be felt.

People should therefore pay attention to changes that are unusual for them and seek medical advice when these occur.

3. Changes in the skin of the breast

Changes in breast skin can sometimes indicate an underlying problem.

Warning signs may include dimpling, puckering, unusual thickening, redness or a texture resembling the peel of an orange.

These changes may occur when cancer affects tissues beneath the skin.

A rare but aggressive form of the disease, known as inflammatory breast cancer, can cause redness, swelling, warmth and thickening of the breast. It may develop without a noticeable lump.

Because these symptoms can resemble an infection, persistent or rapidly developing changes should be assessed by a healthcare professional.

4. Nipple changes or discharge

Changes affecting the nipple may also require medical attention.

These include a nipple that newly turns inward, changes in its direction or develops persistent redness, scaling or crusting.

Another warning sign is spontaneous discharge from the nipple, particularly when it is bloody or occurs in only one breast.

Although nipple discharge can have several non-cancerous causes, unexplained discharge should be evaluated by a healthcare professional.

People should also seek assessment if they notice a persistent sore or skin change around the nipple that does not heal.

5. Persistent breast pain or discomfort

Breast pain alone is not usually a sign of breast cancer. Hormonal changes, menstruation, injuries and other conditions commonly cause breast discomfort.

Nevertheless, persistent or unexplained pain in one area of the breast should not be ignored, especially when it occurs alongside a lump, swelling or skin changes.

Pain should not be the only symptom people watch for, as breast cancer can develop without causing discomfort.

Anyone experiencing persistent breast pain or a new, unusual sensation should seek medical advice to determine the cause.

6. Swelling in the breast or underarm

Unexplained swelling in the breast or underarm may be another warning sign.

Breast cancer can sometimes spread to nearby lymph nodes, including those located in the armpit or around the collarbone. This may cause swelling or a lump in these areas.

In some cases, swelling of the breast may occur without an obvious lump.

Although enlarged lymph nodes can also result from infections and other conditions, persistent or unexplained swelling should be assessed by a healthcare professional.

7. Persistent itching, redness or thickening

Persistent itching, redness, irritation or thickening of the breast skin may sometimes signal an underlying condition that requires medical attention.

These symptoms are often associated with skin irritation, allergies or infections, but certain breast cancers can produce similar changes.

A particularly important warning sign is a change that persists, worsens or fails to improve with appropriate treatment.

People should avoid assuming that every breast skin problem is harmless, especially when the change is new or affects the nipple and surrounding skin.

8. Unexplained changes around the collarbone

Although less widely recognised, swelling around the collarbone may sometimes be associated with enlarged lymph nodes.

In certain cases, breast cancer can spread to lymph nodes in this region.

A new lump or persistent swelling around the collarbone should therefore be examined by a healthcare professional, particularly if accompanied by other breast changes.

However, swelling in this area can have several causes and does not automatically indicate cancer.

Who is at risk of breast cancer?

Breast cancer can affect people of different ages, although the risk generally increases with age.

Other established risk factors include a family history of breast cancer, certain inherited genetic changes, a personal history of breast cancer, exposure to some forms of hormonal treatment and previous radiation exposure to the chest.

Some reproductive and hormonal factors can also influence a person’s risk.

However, having one or more risk factors does not mean someone will necessarily develop breast cancer. Similarly, people without known risk factors can still be diagnosed with the disease.

For this reason, awareness of symptoms remains important even among people who do not have a family history of breast cancer.

What should you do if you notice these symptoms?

Anyone who notices a new or unusual breast change should arrange a medical assessment promptly.

A healthcare professional may examine the breast and recommend further investigations, such as diagnostic ultrasound, mammography or a biopsy, depending on the person’s age, symptoms and clinical findings.

A biopsy involves examining a tissue sample to determine whether cancer cells are present.

People should not wait for a lump to become painful or increase in size before seeking medical attention.

Likewise, they should not assume that a symptom is harmless simply because they are young or have no family history of the disease.

Rapidly developing breast redness, swelling or warmth, particularly when accompanied by fever or feeling unwell, also warrants urgent medical assessment because an infection or another condition may require prompt treatment.

The importance of breast awareness and screening

Breast awareness involves understanding what is normal for one’s breasts and recognising changes that may require medical attention.

Although routine breast self-examination has not been shown to reduce breast cancer deaths when used as a formal screening method, being familiar with one’s body can help identify unusual changes.

Screening recommendations vary according to age, individual risk and the healthcare guidelines being followed. People with a strong family history or known inherited risk may require an individual screening plan.

Anyone concerned about breast cancer should discuss appropriate screening and diagnostic options with a qualified healthcare professional.

Public education, accessible diagnostic services and timely referrals are also important in helping people receive appropriate care.

Conclusion

Breast cancer warning signs can vary from one person to another. A new lump, unexplained swelling, skin dimpling, nipple changes or unusual discharge may indicate a problem that needs medical assessment.

Although these symptoms do not automatically mean cancer is present, ignoring them can delay diagnosis and appropriate treatment.

Improving awareness and encouraging people to seek medical advice when they notice unusual breast changes can support earlier diagnosis and better treatment opportunities.

The message is simple: know what is normal for your body, pay attention to unusual changes and seek professional medical advice without unnecessary delay.