Catching a cold, flu, or stomach bug can throw your blood sugar out of balance. Illness puts extra stress on your body, and the hormones released to fight infection raise your blood sugar levels. Curious about why this happens? Read our article Why Blood Sugar Rises When You’re Sick to learn more.
The good news? With a few simple steps, you can stay on top of things and recover more smoothly. Here’s a practical checklist to guide you through sick days.
1. Monitor more often
- Check your blood sugar regularly: every 2–4 hours if you have type 1 diabetes, and every 4–6 hours for type 2 (or as your provider recommends).
- Test for ketones if you use insulin: every 4 hours (type 1) or every 6 hours if your blood sugar is consistently above 300 mg/dL (type 2).
2. Stay hydrated
High blood sugar makes you urinate more, which can dehydrate you. Drink plenty of fluids, such as water or broth. Aim for small sips throughout the day if you can’t drink much at once.
3. Eat small, steady meals
If you’re not able to eat your usual foods, try to have something with carbohydrates every 2–3 hours. This helps prevent low blood sugar if you’re taking insulin or other medications.
4. Be cautious with medications
Over-the-counter cold or flu remedies can affect blood sugar. Check with your doctor or pharmacist before taking them.
5. Keep records
Write down your blood sugar results, ketone tests, insulin doses, and any other medications you take. This helps your provider make the best decisions if your illness lingers or worsens.
6. Know when to call your doctor
Reach out right away if you have:
- Persistent nausea, vomiting, or diarrhea
- A fever that doesn’t improve
- Chest pain or trouble breathing
- Confusion or unusual sleepiness
- Blood sugar levels consistently above 240 mg/dL
- Moderate to high ketones in your urine or blood
If you can’t reach your provider, don’t wait — go to urgent care or the emergency room.
Final thought
Being sick with diabetes takes extra care, but having a clear plan makes it much easier. Keep this checklist handy so you know exactly what to do when illness strikes. The sooner you act, the quicker you’ll get back to feeling better.
