Twins and Winter Illness: Coughs, Colds, and When to Worry
By Jennifer James, UK twin mum and author of Outnumbered From Day One, the honest guide to life with twins.
Twins get ill together. Not always at the exact same time, usually a day or two apart, which means winter can feel like one long illness that never quite ends. Here's what's normal and what isn't.
Why it always spreads
Sharing a room, a changing mat, toys, and each other's hands means whatever one twin catches, the other usually catches too, generally with a short lag. This isn't bad luck or poor hygiene, it's just how closely twins live together in the early years. Expect it, and don't panic when it happens for the third time in a month during nursery's first winter term.
What's normal
Runny noses, mild coughs, low-grade temperatures and a few off days are a completely standard part of a baby's first winter, more so with two babies bringing bugs home from each other and from nursery or groups. Most of it clears with fluids, rest, and infant paracetamol or ibuprofen if they're old enough and it's needed, dosed correctly for their weight.
The signs that mean get help
The NHS is specific about this, and it's worth knowing before you need it rather than looking it up while holding a crying baby at 2am. Get urgent medical help if your baby: (NHS urgent medical help for babies and children under 5)
- is breathing very fast, grunting, or working visibly hard to breathe
- has blue, grey, pale or blotchy skin, lips or tongue
- feels unusually cold or clammy to the touch
- has a temperature of 38C or higher under 3 months old, or 39C or higher between 3 and 6 months
- has a temperature under 36C
- is unusually drowsy, floppy, or hard to wake
- has a rash that doesn't fade when you press a glass against it
If either twin shows any of these, don't wait to see if the other one develops the same thing first. Treat each baby on their own symptoms.
Stock the kit before you need it
The two weeks after the first cold arrives are not the two weeks to be ordering a thermometer on next day delivery. Get the basics in before winter properly starts: infant paracetamol and ibuprofen, a digital thermometer, saline nasal spray, and enough plasters and antiseptic for two toddlers who will absolutely both need one at once.
The Newborn Twins Survival Guide covers this alongside everything else for the early weeks.
FAQ
Why do twins get ill at almost the same time? Close contact, shared toys and close living quarters mean whatever one catches, the other usually catches within a day or two. It's normal, not a sign of poor hygiene.
What temperature in a baby means I should get help? The NHS advises urgent medical help for a temperature of 38C or higher under 3 months old, 39C or higher between 3 and 6 months, or anything under 36C at any age.
Should I treat both twins the same way if only one is ill? Treat each baby on their own symptoms. One being unwell doesn't mean the other needs treating too, and it doesn't mean the well one will definitely follow.
What should be in a twin-specific first aid kit? Double the consumables that matter most: infant paracetamol and ibuprofen, plasters, a digital thermometer and saline nasal spray.
The Newborn Twins Survival Guide covers this alongside everything else for the early months.