Early Signs of Breast Cancer: What Women Should Watch For

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Breast cancer can sometimes cause visible or noticeable changes in the breast, nipple, or underarm area. In some cases, there may be no obvious symptoms at the beginning, which is why screening remains important for eligible women.

Knowing what is normal for your breasts can help you notice changes that should be checked. A new breast lump, nipple discharge, skin dimpling, nipple inversion, breast swelling, or a change in breast shape does not always mean cancer. However, these changes should be assessed by a breast specialist, especially if they are new, persistent, or affect one side.

Why Breast Awareness Matters

Breast awareness means being familiar with how your breasts usually look and feel. Breasts can change during the menstrual cycle, pregnancy, breastfeeding, menopause, and with age. Some tenderness or lumpiness may also vary from month to month.

However, a new or unusual change should not be ignored. Breast awareness is not meant to replace mammogram screening or medical assessment. Instead, it helps women notice changes and seek review when needed.

Women may check their breasts while showering, dressing, or looking in the mirror. The aim is not to perform a complex examination, but to notice changes that are different from what is normal for you.

1. A New Breast Lump

A new lump in the breast is one of the signs that should be checked. Some breast lumps are benign, such as cysts or fibroadenomas. Others may need further assessment to rule out cancer.

A lump should be assessed if it is:

• New
• Hard or firm
• Irregular in shape
• Fixed in one area
• Growing
• Present after a menstrual cycle
• Associated with skin or nipple changes
• Found in the breast or underarm area

Not all breast cancers cause a painful lump. A painless lump can still need medical review.

2. Thickening or Hardness in the Breast

Some women may not feel a clear lump but may notice an area of thickening, firmness, or hardness. This may feel different from the surrounding breast tissue.

This change may be noticed during bathing, dressing, or lying down. It may be easier to compare both breasts to identify whether one area feels different from usual.

A persistent area of thickening should be assessed, especially if it is new or affects one breast.

3. Change in Breast Size or Shape

Breasts are not always perfectly symmetrical. However, a new change in breast size, shape, or contour should be checked.

This may include:

• One breast becoming noticeably larger or smaller
• New asymmetry
• A change in breast outline
• Swelling in part of the breast
• A change that does not follow the usual menstrual pattern

These changes can occur for different reasons, but medical assessment can help determine whether further tests are needed.

4. Skin Dimpling or Puckering

Skin dimpling or puckering may look like a small dent, pulling, or uneven area on the breast skin. It may appear when the arm is raised or when the breast is viewed from certain angles.

This may happen when tissue beneath the skin pulls inward. It should be assessed if it is new, persistent, or associated with a lump or nipple change.

Women may notice this while looking in the mirror with arms at the sides, raised overhead, or placed on the hips.

5. Redness, Swelling, or Warmth

Redness, swelling, warmth, or tenderness in the breast may be caused by infection, inflammation, injury, or other conditions. In breastfeeding women, infection-related breast inflammation can occur.

However, breast redness or swelling that does not settle should be checked. Medical review is especially important if the breast becomes swollen, warm, painful, or visibly different from usual.

Assessment can help determine whether infection, inflammation, or another breast condition is involved.

6. Nipple Discharge

Nipple discharge can occur for several reasons. Some causes are benign, but discharge should be assessed if it is unusual.

Medical review may be advisable if discharge is:

• Bloody
• Clear and spontaneous
• From one breast only
• From one duct opening
• Occurring without squeezing
• Associated with a lump
• Associated with nipple or skin changes

Milky discharge can occur during pregnancy or breastfeeding, but any unexpected discharge should be discussed with a doctor.

7. Nipple Inversion or Change in Nipple Position

Some women naturally have inverted nipples. This may not be a concern if it has always been present. However, a new nipple inversion or a nipple that suddenly pulls inward should be assessed.

Other nipple changes to watch for include:

• A nipple turning inward
• A nipple changing direction
• New flattening
• Crusting or scaling
• Persistent itchiness
• Bleeding or discharge

Nipple changes may have different causes, but new changes should be checked.

8. Skin Texture Changes

Changes in breast skin texture may include thickening, roughness, scaling, flaking, or an orange-peel appearance. This can be caused by inflammation or skin-related conditions, but it may also need breast assessment if it is persistent or unusual.

Women should seek medical advice if they notice:

• Skin thickening
• New rough or scaly patches
• Persistent redness
• Skin that looks pitted
• Skin changes around the nipple
• Changes that affect one breast

Skin changes should not be treated repeatedly without review if they do not settle.

9. Pain That Is New or Localised

Breast pain is common and is often linked to hormonal changes, muscle strain, cysts, or other non-cancer causes. Breast cancer does not always cause pain, especially at an early stage.

However, pain should be assessed if it is:

• New and persistent
• Located in one specific area
• Associated with a lump
• Associated with nipple discharge
• Associated with skin changes
• Present on one side only
• Worsening over time

A doctor can assess whether breast imaging or further review is needed.

10. Swelling or Lump in the Underarm

Breast tissue extends toward the underarm, and lymph nodes are located in this area. A lump, swelling, or fullness in the underarm may be related to infection, inflammation, vaccination response, skin conditions, or other causes.

However, a persistent underarm lump should be assessed, especially if it is firm, growing, painless, or occurs with breast changes.

Early Breast Cancer May Have No Symptoms

Some early breast cancers may not cause symptoms that can be felt or seen. This is why screening is important for women in eligible age groups, even when they feel well.

A mammogram can detect some breast changes before they become noticeable. In Singapore, screening recommendations may vary by age and risk level. Women with a strong family history or other risk factors may need an individualised screening plan.

Patients should discuss screening timing and frequency with a doctor, especially if they have family history, previous breast disease, dense breasts, or previous abnormal imaging.

When Should You See a Doctor?

Women should seek medical assessment if they notice:

• A new breast lump
• A lump that does not go away after a menstrual cycle
• Breast thickening or firmness
• Nipple discharge
• New nipple inversion
• Skin dimpling or puckering
• Breast redness or swelling that does not settle
• Change in breast size or shape
• Persistent localised breast pain
• Lump or swelling in the underarm
• Any breast change that feels unusual

Prompt assessment is advisable if a breast change is new, persistent, one-sided, or associated with several symptoms.

How Breast Changes Are Assessed

A doctor will usually begin by asking about symptoms, menstrual history, pregnancy or breastfeeding status, medication use, family history, previous breast problems, and screening history.

Assessment may include:

• Clinical breast examination
• Mammogram
• Breast ultrasound
• Breast MRI in selected cases
• Needle biopsy if an abnormal area needs tissue testing
• Review of previous breast imaging if available

Not every patient needs every test. The choice of test depends on age, symptoms, breast density, clinical findings, risk factors, and imaging results.

What Happens If a Mammogram or Ultrasound Is Abnormal?

An abnormal mammogram or ultrasound does not always mean cancer. Some findings may be benign, while others may need further checks.

Further assessment may include:

• Additional mammogram views
• Breast ultrasound
• Short-interval imaging follow-up
• Needle biopsy
• Specialist review

If a biopsy is recommended, the purpose is to obtain a tissue sample for laboratory testing. This helps confirm whether the finding is benign, pre-cancerous, or cancerous.

Breast Cancer Screening in Singapore

Breast cancer screening aims to detect breast changes before symptoms appear. Screening may involve mammograms for women in eligible age groups.

Women may wish to discuss screening if they are:

• In the age range for routine breast screening
• Unsure when to start mammograms
• Concerned about family history
• Previously told they have dense breasts
• Previously had an abnormal breast scan
• Experiencing breast symptoms
• Considering whether ultrasound or MRI is needed

Screening plans may differ for women at average risk and women at increased risk. A doctor can advise based on age, family history, genetics, personal medical history, and previous imaging findings.

Questions to Ask During a Breast Assessment

Patients may wish to ask:

• What could be causing this breast change?
• Do I need a mammogram, ultrasound, or both?
• Is this a screening test or diagnostic test?
• Do I need a biopsy?
• What does the imaging result mean?
• When should I return for follow-up?
• Should I continue routine screening?
• Does my family history affect my screening plan?
• Are there symptoms that should prompt earlier review?
• What treatment options may be discussed if cancer is found?

These questions can help patients understand the next steps and reduce uncertainty during assessment.

Early signs of breast cancer may include a new breast lump, breast thickening, nipple discharge, nipple inversion, skin dimpling, breast swelling, skin texture changes, persistent localised pain, or an underarm lump. Some early breast cancers may not cause noticeable symptoms, so screening remains important for eligible women.

Not every breast change is cancer. However, new, persistent, one-sided, or unusual breast changes should be assessed by a doctor. Clinical examination, mammogram, ultrasound, and biopsy may be used depending on the findings.

Women in Singapore should be familiar with their usual breast appearance and feel, attend appropriate screening, and seek medical advice when breast changes occur.

This article is for general information only and should not replace medical advice from a qualified healthcare professional.

FAQ

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What are early signs of breast cancer?

Early signs may include a new breast lump, thickening, nipple discharge, nipple inversion, skin dimpling, breast swelling, redness, skin texture changes, persistent localised pain, or a lump in the underarm.

Does every breast lump mean cancer?

No. Many breast lumps are benign, such as cysts or fibroadenomas. However, a new or persistent lump should be assessed by a doctor.

Can breast cancer happen without pain?

Yes. Breast cancer may be painless, especially at an early stage. A painless lump or visible breast change should still be checked.

Is nipple discharge a warning sign?

Nipple discharge should be assessed if it is bloody, clear, spontaneous, from one breast, from one duct opening, or associated with a lump or skin change.

Do I still need screening if I have no symptoms?

Screening may detect some breast changes before symptoms appear. Women should discuss mammogram timing and frequency based on age, risk factors, and screening history.

When should I see a doctor for breast changes?

See a doctor if you notice a new lump, persistent thickening, nipple discharge, nipple inversion, skin dimpling, swelling, underarm lump, or any unusual change that does not settle.