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Evidence-led cancer information

Cancer Symptoms: Changes Worth Checking

Cancer can cause many different symptoms, but most possible symptoms have causes other than cancer. Knowing what is normal for you can help you notice a persistent, unexplained or unusual change that deserves medical advice.

Read official NHS cancer guidance (external link, opens in a new tab)Read Our Guide
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Quick guide

Cancer Symptoms at a Glance

What to notice
A new change, or something that persists, worsens, returns or is not normal for you.
What symptoms mean
Most possible cancer symptoms are common and have other causes. A symptom is not a diagnosis.
Who to contact
Contact your GP if a change worries you. Use NHS 111 when you need urgent advice and 999 for a life-threatening emergency.
Screening
Routine screening is generally for people without symptoms. Do not wait for an invitation if you have a concerning change.
What may happen
A GP may examine you, arrange tests, review you later or refer you to a specialist.
If symptoms continue
Ask for another review if a symptom persists, recurs or worsens, or if you remain concerned.

Last reviewed:

Next review due:

2. What Possible Cancer Symptoms Mean

Cancer can affect many parts of the body, so there is no single symptom list that diagnoses it. NHS guidance advises speaking to a GP about a symptom or change that is not normal for you and causes concern.

This guide describes NHS pathways in England. Access and referral arrangements can differ elsewhere in the UK.

3. Changes Worth Checking

Notice patterns rather than trying to diagnose yourself. Contact your GP about a change that persists, worsens, returns or feels unusual for you.

General Changes

  • a new lump or swelling
  • unexplained weight loss, reduced appetite, unusual tiredness, persistent fever or night sweats
  • pain that is new, unexplained or does not settle
  • unusual bruising or bleeding

Changes in a Part of the Body

  • a cough or breathlessness that does not improve, or coughing up blood
  • a lasting change in bowel habit, persistent bloating or difficulty swallowing
  • blood in urine, needing to urinate more often or pain when urinating
  • a new mole or a change in a mole, or a sore or rash that does not heal
  • a breast or chest change, including a lump, skin change or nipple change
  • unusual vaginal bleeding or discharge, or blood in semen

This is not a complete list. The NHS cancer page provides current symptom information, including changes that may be harder to see on Black or brown skin.

4. When and How to Contact Your GP

You do not need to be certain that a symptom is serious before asking for advice. Tell the GP surgery what has changed, when it started, whether it is worsening or recurring, and how it affects you. Mention medicines, previous tests and relevant personal or family history.

Ask for communication support, an interpreter, an accessible appointment or permission to bring someone if that would help. For urgent advice when your GP is closed, use NHS 111 online (external link, opens in a new tab). Call 999 for a life-threatening emergency.

5. Screening and Symptoms

Routine cancer screening is generally designed for eligible people without symptoms. A screening test is not a substitute for clinical assessment and a previous normal result does not rule out every cancer.

Do not wait for a bowel, cervical, breast or lung screening invitation if you have a concerning change. The Library’s bowel, cervical, breast and lung screening guides explain those programmes.

6. What May Happen Next

A GP will consider the symptom, how long it has been present, your medical history and relevant risk factors. They may examine you, arrange a blood test or imaging, ask you to monitor the change, or refer you to a specialist.

An urgent suspected-cancer referral is a precaution, not a diagnosis. NICE advises healthcare professionals to explain what the referral is for, what tests may happen, how results will be communicated and where to seek support.

7. Follow-Up and Safety Netting

Sometimes an initial examination or test does not identify a serious cause. NICE uses the term safety netting for clear follow-up: what changes to watch for, when to return, and who is responsible for reviewing test results.

Contact the clinician or your GP again if a symptom persists, recurs or worsens, a new symptom develops, you do not receive an expected result or appointment, or you remain worried. It is reasonable to ask what should happen next.

8. Common Myths

“A symptom means I have cancer.”

No. Most possible cancer symptoms have other causes, but a healthcare professional can assess them.

“I should wait a few months to see what happens.”

There is no universal waiting period. Contact a GP if a change is persistent, worsening, unusual or worrying.

“A normal screening result means the symptom cannot be cancer.”

No screening test detects every cancer, and screening is not designed to assess symptoms.

9. Frequently Asked Questions

Does having one of these symptoms mean I have cancer?
No. These symptoms are common and often have causes other than cancer. A GP can assess the change, consider other explanations and decide whether any tests or referral are needed.
How long should I wait before contacting a GP?
There is no single safe waiting period for every symptom. Contact a GP if a change is not normal for you, persists, worsens or worries you. Seek help sooner for bleeding, coughing up blood, a new lump or another change that feels urgent.
Should I wait for my screening invitation?
No. Routine screening is generally for eligible people without symptoms. Contact your GP about symptoms rather than waiting for screening, even if an invitation is due soon.
What if a test was normal but the symptom continues?
Contact the clinician or your GP again if the symptom persists, recurs or worsens, or if you remain concerned. NICE describes this follow-up as safety netting.
Does an urgent referral mean I have cancer?
No. An urgent suspected-cancer referral is a precaution to investigate a possible cause promptly. Most referred people will not be diagnosed with cancer.
Can I bring someone to an appointment?
You can ask whether a relative, friend, carer or interpreter can support you. Tell the service about communication, mobility or other access needs when arranging the appointment.

10. Evidence and References

These sources support the symptom groups, primary-care assessment, referral and safety-netting information in this guide.

11. Official NHS Resources

12. How BloomShield Helps

Clear information is one part of equitable access. BloomShield’s connected programmes support understanding, practical access and navigation across screening and care pathways.

ScreenAccess™

identifies and helps address practical, social and service barriers to screening access.

ScreenConnect™

supports navigation, coordination and continuity across screening and care pathways.

Work with BloomShield to improve screening access