• There are five common cancer warning signs in young people 
  • These are: lumps, unexplained tiredness, mole changes, pain, and significant weight change 
  • It’s important to get anything you’re not sure about checked 
  • These symptoms don’t necessarily mean you have cancer, but it’s best to check 


It’s really important to get checked out if you have any of the symptoms below – especially if they last for a while and you can’t explain them. 

The five most common signs of cancer in young people are: 

  • Lumps, bumps and swellings.
    These could be anywhere in your body.
    Lumps, bumps and swellings
  • Unexplained tiredness.
    When you feel completely exhausted, all of the time, and even a good night’s sleep doesn’t help.
    Unexplained tiredness
  • Mole changes.
    This could be a change in the size, shape, colour or texture of a mole, or if it starts bleeding.
    Mole changes
  • Pain.
    The kind of pain that’s persistent and extreme, and doesn’t go away when you take painkillers.
    Persistent pain
  • Significant weight change.
    This could be weight loss or weight gain, when you haven’t changed your diet, how much exercise you’re doing, or any medication you’re on.
    Significant weight change

Other signs and symptoms to watch out for are: 

  • Headaches or dizziness that won’t go away 
  • Getting out of breath more easily than normal 
  • Bleeding you can’t explain – for instance in your urine or poo, after sex, between periods, or if you vomit 
  • Unexplained bruising 
  • Ongoing changes when you go for a poo – like constipation or diarrhoea (or both), pain, or feeling like you’ve not quite finished going 
  • Sweating a lot at night. 

It’s really important to contact your GP if you’re worried about any of these symptoms. 

If it turns out not to be cancer, you haven’t wasted anyone’s time. You’ll still be listened to and taken seriously – the NHS is actively encouraging people to contact their GP if they’re worried about possible cancer symptoms. 

If it does turn out to be cancer, then getting diagnosed early is really important, as early treatment will improve the outcome. 

Either way, you’ll have done the right thing. 

Hear from young people on the importance of getting diagnosed early:


Going to your GP during coronavirus 

During the coronavirus crisis, it’s still really important to call your GP if you’re worried about any of these symptoms. 

Right now, because of the coronavirus crisis, your GP appointment might be by phone or video. If you do need to see a professional face-to-face, they’ll make sure you can do this safely. 

Talking to your doctor

Your doctor will want to know as much as possible about what’s going on, but it’s easy to forget things – so it’s worth writing everything down before your appointment. Think about: 

  • What problems you’re having 
  • How long you’ve had them 
  • Whether the problems are permanent or come and go 
  • Whether they’re getting worse. 

And if you realise that you’ve forgotten something after speaking to your doctor, it’s important to arrange another appointment. You’re never wasting your doctor’s time. 

If you’re worried…

It’s normal to feel nervous before speaking to your doctor. Plenty of young people feel awkward discussing their bodies. And you might feel worried about what you could find out. 

It can help to: 

  • Write down what you want to say and ask beforehand 
  • Make a note of your symptoms and when you started to feel unwell 
  • Share as much information as possible – little details can make a big difference 
  • Have someone from your family attend the appointment with you 
  • Be open and honest – remember that doctors talk to people about all kinds of problems all day, every day 
  • Ask your doctor to repeat anything you don’t understand 
  • Make sure you know what will happen next before you finish the appointment 
  • Make notes about the conversation that will help you remember afterwards. 

Conversations with doctors don’t always go to plan. So if you don’t feel your first appointment goes well, make another one. If that doesn’t go well, make another one again. 

You can ask to see another doctor too, if that helps. Don’t worry, doctors won’t be offended if you ask for a second opinion – and remember you have a right to be taken seriously.

Help us spread the word

Download a printable A3 poster to help you share the five most common cancer warning signs for young people:

  • Best to Check - A3 Portrait.pdf
    [pdf 71.62 KB]

    In May 2018 I had a lump on the side of my neck, but I ignored it at first as I thought I’d hurt myself training. Read Angel's story ›


    I was initially turned away by my GP who thought that the changes to my mole were nothing to worry about. Read Darcy's story ›


    The pains came and went for a couple of weeks before I decided to go to the doctors in February. Read Mitch's story ›


    Alex was diagnosed with acute lymphoblastic leukaemia in June 2019 aged 13. Read Alex's story ›


    When I eventually went to see a doctor, aged 20, I was shocked when they said that I had tongue cancer. Read Olivia's story ›

    How we can help

    Whatever you’re going through right now, you're not alone. Support is always available, whether you have cancer, you’re worried about cancer or someone you know has been given a cancer diagnosis. Get help ›


    Information and resources for young people and families affected by cancer. Read our information ›