The 12 Signs of Breast Cancer: What to Look For
Knowing what a normal breast looks and feels like for you is the single most useful thing you can do u2014 because it is change that matters, not lumpiness itself. These are the 12 breast changes worth checking, how to run a simple self-check, and when a change is a reason to get seen. Most turn out to be harmless; all are worth acting on rather than worrying about in silence.
The one rule that matters most: most breast changes are not cancer u2014 but any new, persistent change deserves to be checked. Being breast aware is not about self-diagnosing; it is about noticing change early and acting on it. If you have found something, this page tells you what it might be and what to do next.
Why breast awareness matters
Breast cancer is the most common cancer in the UK: around one in seven women will develop it in their lifetime, and it can affect men too. The reassuring counterpart to that statistic is that outcomes are strongly linked to early detection u2014 and most breast cancers are found by women themselves noticing a change, not by screening alone. You do not need a formal technique or a set day; you need to know your own normal well enough that a genuine change stands out. When one does, imaging such as a breast ultrasound is often the quickest way to find out what it is.
A note on types (in plain terms)
You may see breast changes described as invasive or non-invasive. Non-invasive changes stay within the milk ducts or lobules; invasive ones have spread into surrounding tissue. You do not need to interpret this yourself u2014 it is what imaging and, where needed, a biopsy establish. The point of self-awareness is simply to get a change looked at early enough for these distinctions to matter less.
Ductal and lobular changes
Two terms come up often: ductal carcinoma in situ (DCIS), changes confined within a milk duct, sometimes called a pre-cancer; and lobular carcinoma in situ (LCIS), changes in the milk-producing lobules that signal a raised future risk rather than a cancer needing immediate treatment. Both are managed by specialists u2014 the reason they are worth naming here is that they are frequently found early, and early is exactly what self-awareness buys.
Risk factors worth knowing
Some risk factors cannot be changed u2014 being a woman, getting older (most cases occur over 50), and family history, including inherited BRCA1 or BRCA2 gene changes. Others are within your influence: alcohol intake, being overweight after menopause, and physical inactivity all modestly affect risk. Knowing your risk profile helps you and your GP decide how vigilant to be u2014 for example whether a family history warrants earlier surveillance. It does not change the core habit: know your normal, and act on change.
The 12 breast changes to look for
During a self-check, you are looking for anything that is new and different from your other breast or your usual pattern. Here are the twelve most useful signs:
- A lump or thickening in the breast or armpit that feels different from the surrounding tissue. Most lumps are benign u2014 cysts and fibroadenomas are common u2014 but every new lump should be checked.
- Swelling of all or part of a breast, even without an obvious lump u2014 sometimes most noticeable near the armpit.
- Skin changes u2014 redness, thickening, or a texture like orange peel.
- A change in size or shape of one breast, particularly a new asymmetry.
- Nipple discharge that is new u2014 especially if it is bloodstained or comes from one nipple on its own (rather than the milky discharge common in pregnancy and breastfeeding).
- A nipple pulling inward (new inversion) or pointing in a different direction from before.
- Dimpling or puckering of the skin u2014 an indentation like the pitting on a peach, sometimes clearer when you raise your arms.
- Redness or scaliness of the breast skin that persists.
- Itchy, flaky or crusting skin on or around the nipple that does not settle.
- New, persistent pain in one part of the breast or nipple. Pain alone is rarely cancer, but pain that is focal and does not come and go with your cycle is worth checking.
- Swelling in the armpit or around the collarbone u2014 which can reflect the lymph nodes.
- A new, unexplained change in how the breast or nipple looks or feels that does not fit any of the above but is clearly different for you.
None of these signs, on its own, means you have cancer u2014 each has common benign explanations. What they share is that they warrant a look rather than a wait.
How to check your breasts
There is no single correct method, and you do not need one. The NHS approach is refreshingly simple: look and feel, know what is normal for you, and report changes. A practical routine:
- Look, in a mirror, arms by your sides and then raised above your head. Note the usual size, shape and outline, and watch for skin dimpling or nipple changes as your arms move.
- Feel, using the flat pads of your fingers, with a firm but gentle touch u2014 the whole breast, up into the armpit and along the collarbone. Many women find this easiest in the shower or lying down.
- Know your timing. Before menopause, breasts are often naturally tender and lumpier in the days before a period, so checking at the same point in your cycle each month makes real changes easier to spot.
Breast awareness is a complement to, not a replacement for, NHS breast screening. If you are unsure whether you need an ultrasound or a mammogram, our guide to breast ultrasound versus mammogram explains which test suits which situation.
Why women wait u2014 and what finally brings them in
The commonest reason for delay is not lack of awareness u2014 it is "ostrich syndrome". In Daniela's experience, women who have felt something often convince themselves it is just a hormonal lump that will vanish after their period, and avoid looking at it again because looking makes it real. The tipping point that finally prompts a booking is usually one of three things: the lump survives two full menstrual cycles without shrinking; it becomes noticeably larger or painful; or a partner feels it and insists they get it checked.
Her message on this is direct, and worth hearing before you are in that position: a benign lump checked early costs you one appointment and a great deal of relief, while a lump ignored for months costs you the one thing that matters most in breast care, which is time. Noticing a change and acting on it is not overreacting u2014 it is exactly the right thing to do.
Shared by Daniela Stan, Consultant Ultrasound Practitioner. General guidance from practice, not individual medical advice.
What to do if you find a change
Do not panic, and do not wait it out in silence. Most changes are benign, but the right next step for any new, persistent change is the same: get it assessed. Contact your GP, who can examine you and arrange imaging u2014 or, if you would rather not wait, you can self-refer for a breast ultrasound directly. Ultrasound is the first-line test for a palpable lump, focal pain or nipple change, particularly under 40, and it tells you quickly whether what you have found is a simple cyst, a benign solid lump such as a fibroadenoma, or something that needs a tissue sample to be certain. Whatever it is, knowing is better than wondering.
See a doctor promptly u2014 do not wait for a screening invitation
A new breast lump, a change in the skin or nipple, bloodstained or one-sided nipple discharge, or swelling in the armpit should be assessed soon rather than left. UK guidance treats an unexplained breast lump as a reason for urgent referral. Early assessment is routine, quick, and far more often reassuring than not.
Breast signs and self-checks: your questions answered
What are the first signs of breast cancer?
There is no single "first" sign, but the most commonly noticed are a new lump or thickening in the breast or armpit, a change in size or shape, skin dimpling or an orange-peel texture, and new nipple changes such as inversion or bloodstained discharge. Any new, persistent change is worth checking u2014 most turn out to be benign.
Are most breast lumps cancer?
No u2014 the large majority of breast lumps are benign, most often simple cysts, fibroadenomas or areas of normal glandular tissue. That is reassuring, but it is not a reason to skip getting a new lump checked: only assessment can tell a benign lump from one that needs further tests.
Can breast pain be a sign of cancer?
Usually not u2014 breast pain is very common and most often hormonal, especially when it comes and goes with your cycle. Pain is worth checking when it is new, focal (one specific area), persistent, or comes with another change such as a lump or skin change.
How often should I check my breasts?
There is no fixed rule u2014 the NHS advises knowing what is normal for you and checking regularly enough to notice change, which for many women is about once a month. Before menopause, checking at the same point in your cycle makes real changes easier to spot against natural monthly lumpiness.
Should I get an ultrasound or wait for my mammogram?
If you have a symptom u2014 a lump, focal pain, a nipple or skin change u2014 do not wait for routine screening: get it assessed now. Ultrasound is the first-line test for a specific lump, particularly under 40. If you have no symptoms and are simply due for screening, attend your NHS mammogram. Our ultrasound vs mammogram guide covers the distinction.
Found something you want checked?
A same-day breast ultrasound tells you what a lump or change actually is u2014 performed and explained in the room by a consultant ultrasound practitioner.
Self-referral, same-day appointments at 29 Weymouth Street, Marylebone u00b7 u00a3235 one side / u00a3350 both u00b7 instant verbal results, BI-RADS written report within 24 hours u00b7 020 3633 4902
Sources and further reading
- NHS.uk u2014 Breast cancer in women: symptoms and breast awareness guidance. Accessed July 2026.
- NICE Guideline NG12 u2014 Suspected cancer: recognition and referral (2015, amended 15 April 2026): urgent-referral criteria for unexplained breast lumps and nipple changes. Accessed 11 July 2026.
- NHS Breast Screening Programme u2014 invitation ages and interval. NHS.uk, accessed July 2026.
This article is general health information, not a diagnosis or individual medical advice. It was prepared by the Sonoworld clinical team from the practice experience of Daniela Stan, Consultant Ultrasound Practitioner, and against the guidance listed above. A new breast change should be assessed promptly rather than left. Sonoworld Diagnostic Services, 29 Weymouth Street, Marylebone, London W1G 7DB u2014 CQC-registered.
