In short
A brain tumour can cause a new persistent headache, a first seizure, morning sickness, vision or speech problems, personality change, or weakness on one side. About 16,000 people in the UK are diagnosed each year, including non-cancerous tumours. Headaches alone are usually not a tumour. New, worsening or combined neurological symptoms should be assessed promptly.
Tumours range from slow-growing and benign to aggressive cancers. Symptoms depend on where the growth sits, not only on whether it is cancer.
Which symptoms need a doctor urgently?
A first seizure, sudden severe headache unlike your usual ones, or rapidly worsening weakness or speech is an emergency. Call 999 if someone is fitting or cannot be roused.
- A new severe or persistent headache, often worse in the morning
- A seizure for the first time
- Feeling sick, especially in the morning
- Problems with vision, speech or balance
- Personality, memory or behaviour change
- Weakness or numbness on one side
Are all brain tumours cancer?
No. Meningiomas and some other tumours are often benign but can still cause serious symptoms by pressing on the brain. Treatment may still be needed.
Help a patient afford cancer care
Gifts go to the Cancer Emergency Appeal’s wider fund for patients who cannot pay. They do not buy a guaranteed treatment or result.
Donate to cancer careIs a brain tumour the leading cancer killer under 40?
Brain tumours are a leading cause of cancer death in people under 40 in the UK. That statistic includes children and younger adults. It is why new neurological symptoms are taken seriously.
Key takeaways
- New neurological symptoms matter more than a typical tension headache.
- Not every brain tumour is cancer, but all can cause harm.
- A first seizure needs urgent assessment.
Care like this is out of reach for millions
The diagnosis, screening and treatment described here are routine in the UK. In Pakistan, Indonesia and Malaysia, poverty can put them out of reach. The Cancer Emergency Appeal raises funds towards clinically recommended care for patients who cannot pay; gifts go to the wider fund and do not buy a guaranteed treatment or result.
Frequently asked questions
Does a normal headache mean a tumour?
Almost never. GPs look for red flags such as a first seizure, morning vomiting, or progressive neurology.
Can stress cause tumour-like symptoms?
Anxiety can cause headaches and tingling. That does not mean you should skip a GP if symptoms are new and persistent.
Do you fund brain tumour surgery overseas?
When a licensed partner neurosurgical hospital can treat an eligible patient who cannot pay.
Editorial summary of published sources. A named oncology clinician has not signed off this guide. Use it to prepare questions for your healthcare team, not to diagnose symptoms or choose treatment. Editorial responsibility: Kaiser Khan. Updated 4 October 2026.
What are the sources for this guide?
Follow the original guidance for its evidence, dates and limitations. General background references are not a clinical review of this page.