Because being there is already enough.
This guide is for teen siblings* of children with cancer or other serious illnesses** who want to learn how to start or navigate sensitive conversations about processing the diagnosis at an early stage. If you’re involved in the care or well-being of your sibling with cancer or other serious illnesses—or anticipate you will be in the future—you’re in the right place. We’re here to give you actual, practical tools to help you find your footing, talk about the hard stuff when you’re ready, and process all of this at your own pace.
*Throughout this guide, the term teen siblings refers to siblings, siblings-in-law, cousins, and other extended family members or young caregivers between the ages 13~18.
**While a lot of this guide focuses on cancer, the term “other serious illnesses” refers to any severe, life-changing health condition—including complex chronic diseases, severe genetic disorders, major heart conditions, or sudden traumatic injuries.
This guide was developed entirely by Sibling Society. While we’ve made every effort to ensure the information in this guide is accurate and up to date, it should be noted this resource is not a substitute for professional advice. Note that the insights and coping strategies outlined in this guide are grounded in the real, lived experiences of siblings whose brothers or sisters had serious illnesses within their own families. They are intended for peer-support and educational purposes only.
We are always looking to improve our resources to better support our community. Should you have any suggestions, edits, or feedback regarding this guide, please email us at siblingsociety2024@gmail.com
Founded by a sibling whose younger sister was diagnosed with leukemia, Sibling Society is a registered nonprofit organization in Ontario dedicated to supporting, empowering, and informing siblings of children with cancer, so they can move forward in their changing role with confidence and strength. We provide peer support counseling, mentorship programs, and community events to help siblings process their feelings and experiences by forming a deeply connected community. Visit siblingsociety.org for more information.
When someone is going through treatment, a lot is happening that you may not be able to see.
Your brother or sister might be spending more time at the hospital, taking medications, missing school, or dealing with side effects that make everyday activities harder. Even if they don’t always talk about it, they may be having lots of feelings about what’s happening.
Here’s something important to remember: You don’t have to guess exactly how your sibling feels. Every person experiences illness differently. But understanding some of the feelings they might be having can help you be more patient, supportive, and connected.
You may even notice that some of these feelings sound familiar. It’s completely normal for siblings to share many of the same worries and emotions.
Add anything on your sibling’s feelings bulletin board!
You do not need to solve every problem or make everything better. Sometimes the best thing you can do is simply remind your sibling that they are not going through this alone. Here are some ideas you can try.
One of the greatest gifts you can give is your time. You don’t need a big plan or special activity. You can:
Small acts of kindness can make a big difference. Little gestures show your sibling that you’re always thinking about them. You can:
Being away from school, friends, and activities can feel lonely. You can help your sibling stay connected by:
A shared project can become a special memory between just you and your siblings! You don’t need to be artistic. The goal is simply to create something that belongs to both of you.
You don’t have to be the perfect sibling.
You don’t need to know exactly what to say.
You don’t need to fix everything.
The fact that you’re reading this and thinking about how to support your brother or sister already shows how much you care.
Sometimes the most powerful message you can give your sibling is simply:
“I’m here.”