
Des symptômes de cancer à ne jamais ignorer
Peer reviewed by Dr Colin Tidy, MRCGPLast updated by Lynn StephenLast updated 5 Dec 2025
Répond aux besoins du patient lignes directrices éditoriales
- TéléchargerTélécharger
- Partager
- Langue
- Discussion
When it comes to unexplained medical symptoms, it's easy to bury your head in the sand and ignore them, especially if they're a bit embarrassing to discuss. But getting them checked out by a doctor could end up saving your life.
Here are the cancer symptoms you should never ignore.
Dans cet article :
Being aware of changes in your body could save your life - whether it's a lump that's appeared, changes to your toilet habits, or a bloated tummy that you've had for weeks.
Where cancer is concerned, the earlier you're diagnosed and treated, the less extreme your treatment is likely to be and the better your chances of recovery.
The first thing you can do is get to know your body and what is normal for you. If you do notice a change or something that doesn't seem right - whatever it is - tell your doctor. It most likely won't be cancer but, if it is, catching it early could mean that treatment is much more likely to be successful, giving you a better chance of beating the disease.
Here are some of the signs it's particularly important to let your doctor know about.
Poursuivre la lecture ci-dessous
Du sang dans le caca
If you've experienced a change in how often or when you go to the toilet or you see blood in your poo for more than three weeks, you should see your doctor. Looser or more frequent poos are a particular concern. Now, while we all do it, pooing is the last thing most of us want to read about over our breakfast cup of tea. But ignoring possible bowel cancer symptoms can put you at real danger.
If you do have bowel cancer - and it's the second most common cancer killer in the UK - getting it diagnosed early hugely increases your chance of successful treatment.
Ballonnements
Bloating is a common but annoying symptom that usually goes away by itself. We're talking here about persistent bloating - not the kind that comes on after a big meal and settles in an hour or two. If you've been feeling bloated for 12 days or more in the last month, go to your doctor. It's may be nothing serious, but it could be a sign of ovarian cancer. It could also be IBS or premenstrual syndrome, but don't self-diagnose.
Annwen Jones, former CEO of Target Ovarian Cancer, says the symptoms of ovarian cancer include persistent bloating, always feeling full, tummy pain, and needing to pee more.
"If you're having any of these symptoms regularly, and they are not normal for you, it is important that you see your doctor," she explains. "It's unlikely that your symptoms are caused by a serious issue, but getting checked out by your doctor is important, and will put your mind at rest.
"Early diagnosis of ovarian cancer makes the disease easier to treat. Our nurse-led Support Line is here for anyone who has questions about ovarian cancer - call 020 7923 5475."
Poursuivre la lecture ci-dessous
Coughing and feeling out of breath
People often worry that their persistent cough is due to lung cancer. It almost always isn't, but if your cough doesn't settle or you're coughing up blood or having difficulty breathing, you should always see a doctor.
The National Institute for Health and Care Excellence (NICE) recommends you should be referred for an urgent chest X-ray if you're over 40 and have two or more of these symptoms with no other explanation:
Toux.
Fatigue.
Essoufflement.
Douleur thoracique.
Perte de poids.
Perte d'appétit.
If you're a smoker, an ex-smoker, are over 40, and have just one of these symptoms, you should be referred for an urgent chest X-ray.
Les bosses et les creux
Finding a lump in your breast can cause you to worry. It's unlikely to be breast cancer - as there are many other causes of breast lumps - but you should always get checked out.
Samia al Qadhi, former chief executive of Breast Cancer Care explains that there's no right or wrong way to check your breasts - it's about looking and feeling regularly so any changes can be spotted quickly.
"The sooner breast cancer is diagnosed, the more effective treatment may be," she says. "Being aware of all the signs and symptoms of breast cancer is crucial - it's not just a lump to look out for. Other changes could be a nipple becoming inverted, discharge from one nipple or a change in texture of the skin.
"While most symptoms won't mean breast cancer, if you notice anything unusual get it checked out by your doctor."
Whilst breast cancer in men is rare - the above is true for men- any lumps or changes to breast tissue or the skin on the chest need to be check out by a doctor.
Similarly, men should check their testicles regularly. If you notice a change in size or weight of a testicle, or any swelling or tender spots, see your doctor. Doctors are used to examining breasts and genitals. So don't be embarrassed. They've seen it all before.
Poursuivre la lecture ci-dessous
Bleeding after menopause
Bleeding from anywhere is scary, and vaginal bleeding once you've gone through menopause can be especially worrying.
Doctors call postmenopausal bleeding (PMB) any bleeding more than 12 months after a woman's last period. If you're taking hormone replacement therapy (HRT) you may get regular periods - depending on the type you are on. But check with your doctor if you get significant bleeding that is unusual whilst you are taking the HRT, or for more than four weeks after you stop HRT.
Every woman worries about cancer, but around 9 in 10 who have PMB can be reassured after referral and testing that there's no sinister cause. Your specialist doctor will need to rule out cancer of the womb lining as well as cancer of the cervix. Some women have a polyp - a small, non-cancerous growth from the womb lining. Many others get PMB because of inflammation of the vaginal lining, caused by vaginal dryness after the menopause.
Persistent heartburn
Most people who suffer heartburn, bloating, feeling sick, and/or an acid taste in the back of the throat have simple inflammation of the oesophagus (oesophagitis) to blame for their discomfort. Likewise, burning pain in the top of your tummy in the middle, sometimes associated with bloating, nausea, and wind, is most commonly down to inflammation of the stomach lining, or gastritis.
Symptômes à ne pas ignorer en cas de brûlures d'estomac :
Persistent heartburn or indigestion (acid reflux, dyspepsia).
Vomissements après avoir mangé.
Sensation de satiété après une petite quantité de nourriture.
Les aliments restent collés lorsque vous essayez de les avaler - difficulté à avaler (dysphagie).
Perte de poids.
Douleur à l'avant ou à l'arrière de la poitrine lorsque vous avalez.
Perte d'appétit.
Douleurs persistantes à l'estomac.
Nouvelle sensation de fatigue permanente.
Caca plus foncé - s'il est noir ou goudronneux, appelez immédiatement une ambulance car il peut s'agir d'une hémorragie gastrique qui peut mettre la vie en danger.
Cancer of the oesophagus causes around 8,000 deaths a year in the UK. Most people with this form of cancer are over 50 - but anyone with persistent symptoms needs to be checked out. Stomach cancer is less common in the UK than in some other countries. But the number of people affected is rising. Getting a diagnosis and treatment early can make all the difference to your chances of long-term survival.
Changes to a mole
See your doctor if you develop an abnormal patch of skin or a change in appearance of a mole to rule out skin cancer.
Get to know your body and the normal moles or marks so that you will know if there has been any change. Check your moles regularly, and if you notice any change in the size, shape, or colour of an existing mole, or if a new dark area of skin develops, see your doctor.
Perte de poids inexpliquée
In most cancer cases, other symptoms will be apparent before any weight loss occurs. But occasionally unintentional weight loss is the first symptom people notice for multiple types of cancer.
Besides cancer, if you've lost a significant amount of weight without meaning to, you should see your doctor who might test you for type 2 diabetes, depression or hyperthyroidism.
If you don't get referred
It's important to remember that if your doctor decided you don't need investigating, they should be happy to explain their reasons to you.
Doctors are often able to reassure patients that their symptoms are due to a minor cause, but that's not always the case. And if they don't hear about your symptoms, that's a conversation they can't have with you.
Patient picks for Information about cancer

Le cancer
Pilates clinique : un soutien à la guérison du cancer du sein
Le cancer du sein est le cancer le plus fréquent chez les femmes au Royaume-Uni, avec environ 55 000 femmes diagnostiquées chaque année. Si vous vous remettez d'un cancer du sein, l'intégration d'une activité physique douce dans votre routine peut vous apporter toute une série d'avantages pour votre rétablissement et votre bien-être.
par Victoria Raw

Le cancer
8 conseils pour réduire le risque de cancer à tout âge
Le cancer chez les personnes de moins de 50 ans est en augmentation depuis les années 1990 et a progressé de 79 % au cours des trente dernières années. L'évolution du régime alimentaire et d'autres facteurs liés au mode de vie jouent un rôle important dans cette augmentation. Nous examinons les habitudes de vie considérées comme les plus importantes pour réduire le risque de cancer.
par Lawrence Higgins
Poursuivre la lecture ci-dessous
Historique de l'article
Les informations contenues dans cette page ont été évaluées par des cliniciens qualifiés.
Next review due: 4 Dec 2028
5 Dec 2025 | Latest version
16 Feb 2018 | Publié à l'origine
Auteur: :
Dr Sarah Jarvis MBE, FRCGP

Demandez, partagez, connectez-vous.
Parcourez les discussions, posez des questions et partagez vos expériences sur des centaines de sujets liés à la santé.

Vous ne vous sentez pas bien ?
Évaluez gratuitement vos symptômes en ligne
Sign up to the Patient newsletter
Your weekly dose of clear, trustworthy health advice - written to help you feel informed, confident and in control.
By subscribing you accept our Privacy Policy. You can unsubscribe at any time. We never sell your data.