Supporting Siblings of Children with Type 1 Diabetes

When a child is diagnosed with Type 1 diabetes, the immediate focus quite rightly falls on that child: learning to manage blood sugar, adjusting to injections or a pump, understanding carbs, diabetes clinics and navigating the healthcare system. But there are often other children in the family who are watching all of this, feeling it too and quietly wondering where they fit in. Point in question, my son is a twin and his brother doesn’t have T1.

Siblings of children with Type 1 diabetes are sometimes called the forgotten patients. That is a little dark, but it points to something real. Their needs do not go away because someone else's needs are louder.

What Siblings Often Feel (But May Not Say)

Children are perceptive. They notice when a parent leaves the dinner table to treat a hypo. They hear the CGM alarm going off at 3am. They see the careful attention paid to food and they notice when activities are changed, cancelled, or complicated because of blood sugar.

What they may feel as a result is not resentment of their sibling. Most siblings have a lot of love for the child with T1D. What they may feel is being left out when the child with diabetes receives extra attention, worried because they understand at some level that the alarms mean something is wrong, guilty for feeling any of the above, confused about what Type 1 actually is, or anxious about their sibling during sleepovers, school trips, or other times when they are apart.

Some siblings become hyper-vigilant, taking on a monitoring role they were not asked to play. Others pull away, spending more time in their room or at friends' houses as a way of creating space from the constant medical activity. Neither response is unusual, and neither means they are not coping well.

Making Time That is Genuinely Theirs

One of the most effective things a parent can do is create regular time with the non-diabetic sibling that is entirely separate from diabetes. Not time where you also happen to check blood sugar, or time where the conversation drifts back to clinic appointments. Time that is fully theirs. This does not have to be elaborate. A walk together. A shared TV programme. A trip to their favourite lunch spot. Sometimes I’ll take my non T1 son out to the cinema, just him and I and we eat whatever sweets we want without having to think of carb counting.The activity matters less than the consistency and the signal it sends: that you see them, you value them and not everything in the family revolves around their sibling's condition.

Giving Them an Age-Appropriate Explanation

Children of all ages benefit from honest, clear explanations of what Type 1 diabetes is. Keeping them in the dark does not protect them. It usually just leaves them to fill in the gaps with worry. This does happen, I know from first hand experience, so honesty is best.

For younger children, keep it simple: "Your brothers's body cannot make its own insulin, which is what helps us use food for energy. He wears a sensor that checks his sugar levels and sometimes he needs medicine to keep him safe." For older children and teenagers, they may want more detail. Many siblings appreciate being shown how the CGM works, or understanding what happens during a hypo. When they understand why a parent wakes up in the night to check, or why certain foods require more planning, it can shift the feeling from disruption to something that they understand and know the “why” behind it.

Involving Siblings in a Healthy Way

There is a meaningful difference between a sibling feeling involved and a sibling feeling responsible. The first is healthy and often positive. The second can lead to anxiety and an unfair burden. Healthy involvement might look like understanding what the Glowcose Light colours mean so they can glance at it too, knowing to tell a parent if their sibling seems unwell, being included in simple decisions like choosing a T1D-friendly snack everyone will enjoy, or coming along to a diabetes event if they want to. We noticed our non T1 son being vocal when he saw the light going red, this gave him a sense of “he was helping out too” and it helped keep him feeling he was important and helping too.

Unhealthy involvement looks more like feeling they must always watch their sibling, being told to alert a parent if the sibling seems off in a way that makes them feel responsible for their sibling's safety, or having their own needs consistently deprioritised in service of diabetes management. If a sibling seems to be taking on a carer role of their own accord, it is worth gently addressing that. Their job is to be a child, not a backup health professional. Let kids be kids without the worry of appearing to need to look after their T1 brother/sister.

Handling Fairness

Siblings will often notice, quite rightly, that the child with T1D seems to get things they do not. It is worth being honest about this rather than pretending everything is exactly equal. "Your brother needs a snack right now because his blood sugar is low. That is not a treat, it is medicine." Children can accept unfairness when it is explained honestly. What is harder to accept is when it is ignored or minimised.

Connecting Siblings with Others in the Same Position

There is real comfort in knowing you are not the only child living this. Some families find that sibling support groups, online communities, or T1D family events give non-diabetic children a space to voice feelings they might not bring up at home. Organisations that support families affected by Type 1 diabetes often have resources or events specifically for siblings. Our non T1 son loves to attend diabetes fun days, organised locally. He gets to meet other kids and he has made friends with other T1 kids. It also helps him understand and see how other kids deal with their diabetes.

When to Seek Extra Support

Most siblings adjust well over time, especially when they feel seen, informed, and included. But some do develop anxiety, school avoidance, or behavioural changes that go beyond what can be addressed within the family. If you notice persistent changes in mood, sleep, appetite, or behaviour in a sibling, it is worth speaking to your GP to get a referral to a child psychologist. Their experience of living with a sibling's condition is a legitimate reason to seek support and accessing that support early is much easier than waiting until things become more difficult.

A Final Note for Parents

Managing Type 1 diabetes is all-consuming in a way that is hard to fully explain to anyone who has not lived it. Doing all of that while also making sure another child or multiple children, feel equally valued, is quite the juggling trick. You do not have to be perfect at it. Small, consistent efforts to acknowledge a sibling's experience tend to matter more than grand gestures. Just making sure they know they are seen is usually enough to make a real difference.

Kids love attention…so give them attention. Make them feel part of things.

Paul @ Lewcose