When a child or teenager is diagnosed with cancer, their siblings often experience a wave of emotions; confusion, fear, jealousy, guilt, and even loneliness. While the focus naturally shifts to the child receiving treatment, siblings need support too. This guide offers practical ways to help siblings feel seen, heard, and emotionally supported.
Understanding Sibling Emotions
Siblings may not fully understand what’s happening, but they feel the change. They might worry about their sibling, feel left out, or act out in response to stress.
Common reactions:
- Withdrawal or clinginess
- Anger or resentment
- Regression (e.g. bedwetting, tantrums)
- Overcompensation or “being extra good”
Tip: Validate their feelings. Let them know it’s okay to feel upset, confused, or even jealous.
Communication and Inclusion
Keeping siblings informed helps reduce anxiety and builds trust.
Suggestions:
- Use age-appropriate language to explain the situation
- Let them ask questions and answer honestly
- Involve them in small ways; choosing a gift, drawing a card, helping pack
- Share updates regularly, even if brief
Tip: Avoid secrecy. Children often imagine worse scenarios when left in the dark.
Expression and Emotional Outlets
Give siblings space to express their feelings through creative or physical activities.
Ideas:
- Drawing, painting, or journaling
- Role-play or storytelling
- Physical play or sports
- Talking with a trusted adult or counsellor
Optional: Create a “sibling box” with calming tools, books, or activities just for them.
One-on-One Time and Reassurance
Siblings need to feel they still matter. Even short moments of focused attention can make a big difference.
Suggestions:
- Plan one-on-one time with each sibling
- Celebrate their achievements and milestones
- Reassure them that they are loved and important
Final Thoughts
Supporting siblings during a cancer diagnosis is about balance, empathy, and inclusion. They are part of the journey too.
Parent Voices
Anonymous comments shared by parents who have walked a similar path.
“I tried so hard to be brave, but inside I was scared something would happen to my brother while we were apart.”
— Sibling, age 11 (youth cancer sibling forum)
My daughter started acting out, not because she was angry at her sister, but because she felt invisible. Once we gave her small roles to help, she softened.”
— Mother of two (parent support group)
“No one told me what was happening. I thought cancer was contagious and that I’d get it too. Honest explanations would have helped.”
— Sibling, age 9 (children’s health forum)
“One-on-one walks with my dad saved me. For that half hour, I wasn’t the ‘healthy kid’. I was just me.”
— Age 14 (teen mental health community)
“When adults whispered updates, I imagined the worst. Even short, simple updates helped me feel less scared.”
— Sibling, age 10 (sibling support group)
“Celebrating my achievements made a huge difference. I needed someone to notice that I was growing too.”
— Age 13 (international youth resilience forum)
“When my sister was in the hospital, Mum and Dad took turns staying home with me. It helped so much. I missed both of them, and I didn’t like being with the au‑pair all day. Knowing one parent would always be with me made me feel less lonely.”
— Sibling, age 10 (family support experience)