It’s never easy to tell a child that someone in their family has cancer, but it’s important. Children can pick up on changes in mood, energy, or routine, even if they don’t understand the underlying cause, and when those changes go unexplained, they can jump to their own conclusions, sometimes blaming themselves or imagining the worst-case scenario. In these situations, just being honest about what’s going on can help ease confusion and strengthen your relationship, according to Cancer Research UK.
Tailor the conversation by age
There’s no one-size-fits-all script when it comes to opening up to your kids. What you say and how much you share should depend on their age and emotional maturity.
Young children (under 7) often need simple explanations and concrete reassurances. You might say something like, “I have an illness called CML. It means I have to take medicine and sometimes go to the doctor, but the medicine helps me feel better.” Focus on how it affects their daily life and make room for repetition; younger kids may ask the same question more than once.
School-age children (7 to 12) are likely to ask more detailed questions. They may want to know the name of the illness, how it’s treated and whether it’s contagious (it’s not). It helps to be straightforward and open. They may also need to hear — more than once — that they’re not to blame and that the adults in their life are working together to manage things.
Teens often want more autonomy and information. They may want to do their own research, or worry quietly without asking questions. Let them know it’s OK to feel however they feel, and that they’re welcome to talk (or not) at their own pace. If possible, invite them to be part of the process, whether that means attending appointments or looking up information online and discussing their concerns.
What if you’re not ready to tell them?
Some people need a little more time than others before they’re ready to talk, whether that’s to think things through or simply figure out what they want to say. This is OK, but it’s also important to recognize that children are observant — they tend to notice when routines change or your energy is not the same. If no one says anything, they’re often left to fill in the blanks themselves. Remember, you don’t have to cover everything at once. According to the Dana-Farber Cancer Institute, breaking the news into smaller conversations over time can help. And if the moment feels too big to handle alone, a family member, counsellor or healthcare provider can support you through it, or even help guide the discussion.
The conversation doesn’t have to be perfect. What matters most is being present, listening closely and keeping the door open to communication. Even when answers are hard to come by, showing up with honesty and care can go a long way.
Other resources that can help
Macmillan: Talking to Children About Cancer
Includes practical examples of what to say, how to prepare and what kinds of questions children might ask.
This guide offers practical tools for starting conversations gradually, especially when you’re not sure how much to say.
American Cancer Society — Telling a Child Someone They Love Has Cancer
This site advises being honest and open and warns that if children think something important is being kept from them, they might feel confused or afraid. It encourages using words they can understand, pacing the information and letting them ask questions.