Skip to main content
Submitted by Dr S. Patel on 28 November 2021

If you have diabetes, your chances of getting an infection are higher than a person without diabetes. Having a cold, flu, COVID-19 or any other infection can then cause your blood glucose levels to increase. Thus, knowing how to handle such days and being prepared can prevent distress and complications that can occur due to hypergylcemia or high glucose levels in blood.

What happens when you fall sick?

When the body is unwell due to an infection or allergy, the immune system gets activated and certain hormones are released to help fight the ailment. These hormones however raise the blood glucose levels in spite of the presence of insulin in the body. Thus, persons with diabetes are at a risk of raised glucose levels even with minor ailments like a cold or flu. This can lead to a state of diabetic ketoacidosis (where the glucose converts fat into ketones) which can be life-threatening.

Illness likely to affect your blood sugar levels

Illness such as infections, cardiovascular events, dehydration or electrolyte imbalance can all lead to fluctuation in the blood glucose levels. Some of the common infections known to affect Persons with Diabetes include:

  • Common cold, flu, sore throat.
  • Respiratory infections like Covid-19, Bronchitis etc.
  • Gastrointestinal problems like food poisoning, upset stomachs, vomiting, diarrhea etc.
  • Skin infections like rash, abscesses etc.
  • UTIs and bladder infections

Related Reading: Medicines that alter blood glucose levels

How to be prepared?

Watch out for symptoms/ signs of any illness. Fever is always a clear sign of infection.

Speak to your Care team beforehand and discuss what your blood glucose levels should be in the event of an illness. Discuss new targets, how to adjust medications, when and how often to monitor glucose & ketone levels and when to call the doctor during a sick day.

Keep a thermometer, glucometer and BP machine at home for easy monitoring.

Keep a few over-the-counter pain and fever reducing pills which can be taken immediately when prescribed by your doctor.

Educate your family members about your list of medications and signs of hypergylcemia.

Keep a list of your doctors and local pharmacists and their contact numbers handy(on your fridge, phone or room).

What to do on a sick day?

  • Do not skip on your diabetes medications including insulin. Take them on time as you would on any day even if you are not eating and drinking like normal.
  • Use a glucometer to check your blood glucose levels 4 times a day. Keep a log of your recorded levels to show your doctor.
  • Drink plenty of fluids to avoid dehydration. A cup of water every hour is a good measure of fluid. Avoid tea, coffee and sodas that are high in calories and caffeine. Opt for water, soups and plain yogurt drinks.
  • Try to eat normal meals. If you are unable to eat normally or have nausea/vomiting, then have some sugary drinks to prevent drop in sugar levels. However, make sure you monitor the intake of the sugar in these drinks.
  • To prevent hypoglycemia (low glucose levels) when you are unable to eat regular meals, instead try having have some light snacks like dry toasts, crackers, parathas/roti, or biscuits.
  • Weigh yourself everyday because unwanted weight loss is a sign of high blood glucose.
  • Check your temperature for fever frequently. It is an indication of infection.
  • Watch your blood pressure levels. Blood pressure may decrease if there is less fluid intake and dehydration.

When to seek medical attention?

  • Call your doctor and inform him about your symptoms and blood glucose levels so he/she can advise you on how to take care of it and if you need to come in for physical check-up.
  • If you are having frequent vomiting or diarrhea (more than 3 times a day)as this can quickly cause dehydration in the body. Ask your doctor if any medicines need to be altered.
  • If your blood glucose levels are above 240 mg/dl even after taking your medications on time.
  • If you have unresolving or high fever (above 103.5F).
  • If you are having difficulty breathing, dizziness, confusion or severe pain.
  • Persons with diabetes and their care providers should be aware of Diabetic Ketoacidosis so that you can seek immediate medical attention if any of the signs or symptoms are present. These include:
    • Blood glucose levels above 270 mg/dl
    • Presence of ketone in urine while doing a home ketone test
    • Excessive thirst
    • Increase in heart rate
    • Fruity smelling breath

Read this: What to do when your blood sugar falls

Note: Remember not to stop your medications for Diabetes on your own. Check with your doctor and follow your doctor’s advice on any changes in your doses.

People with Type 1 Diabetes must keep a close eye on their insulin levels and follow insulin adjustment protocol as prescribed by their doctor.

Community
Condition

Stories

  • Tears of a Clown
    Christina Kim, long one of the LPGA Tour's most effervescent personalities, opens up about her battle with depression. "I felt like all the fun and joy was suffocating me," she says now. "I looked down, and the water seemed very inviting, even though I can't swim. The solitude and silence that I was seeking, which I couldn't find anywhere in the building because everyone was laughing and living life and being happy, seemed to be in the water." She thought it over, stood there for about 15…
  • Diabetes FAQ - Questions that you wanted to ask but never did
    Based on a discussion with Dr. Venkat Rao, Diabetologist 1. My mother has diabetes. Should I get my blood sugar checked? I am now 30 years old.  Everybody should get their blood sugar tested once a year after the age of 30, irrespective of whether or not there is a family history of diabetes. This is especially true for Indians as India has a high incidence of diabetes.  If you have a family history of diabetes with a tendency of early occurrence; if you are obese…
  • For 13 years she was afraid of telling people she had Type 2 Diabetes
    Today Juliana Lim from Singapore is a team leader in a Diabetes Support Group inspiring others to be open about their condition. Read about her inspiring story
  • 7 reasons to love Chia Seeds. Plus 3 simple recipes.
    By nutritionist Kohila Govindaraju What are Chia Seeds ? They are a member of the mint family Why love them? • Chia seeds improve insulin sensitivity and glucose tolerance. The soluble fibre in the seeds helps to stabilise blood glucose levels. When soaked in liquid, they develop a gelatinous texture. This gel formation phenomenon creates the barrier between carbohydrates and digestive enzymes that ultimately slow down the conversion of carbohydrates into simple sugar.…
  • Malays, Indians with Type 2 diabetes more likely to suffer strokes, heart attacks: Study
    SINGAPORE: In a decade-long diabetes study, researchers from Khoo Teck Puat Hospital (KTPH) found that among those with Type 2 Diabetes Mellitus (T2DM), Malays and Indians are at higher risk of cardiovascular diseases compared to Chinese patients. Malay patients had two times higher risk while Indians had 1.7 times higher risk of diseases such as heart attacks and strokes, compared to Chinese patients with T2DM, according to findings of a study released by the healthcare cluster that manages…
  • Diabetes has kept me healthy
    SR Madhu, 73, has had diabetes for 23 years, and has avoided the health hazards faced by his peers. He thanks the diabetes lifestyle for his wellbeing. Plus, his experience of hypoglycaemia.  I was quite upset to discover in 1991 that diabetes had hit me. I had been "on the borderline" of diabetes for a few years whenever I had been tested in India. But when I crossed the international border in 1991 to take up a UN assignment in Zimbabwe, the diabetes crossed…
  • FDA Approval For Two-In-One Diabetes Pill XIGDUO™ XR
    U.S. Food and Drug Administration has approved once-daily XIGDUO™ XR (dapagliflozin and metformin hydrochloride extended-release) for the treatment of adults with type 2 diabetes. It is already approved in Australia XIGDUO XR combines two anti-hyperglycemic agents with complementary mechanisms of action, dapagliflozin (trade name in the U.S. FARXIGA™), an inhibitor of sodium-glucose cotransporter 2 (SGLT2), and metformin hydrochloride (HCl) extended-release, a biguanide, in a once-daily oral…
  • Giant leap in Type 1 Diabetes treatment
    Harvard stem cell researchers today announced that they have made a giant leap forward in the quest to find a truly effective treatment for type 1 diabetes, a condition that affects an estimated 3 million Americans at a cost of about $15 billion annually. With human embryonic stem cells as a starting point, the scientists are for the first time able to produce, in the kind of massive quantities needed for cell transplantation and pharmaceutical purposes, human insulin-producing…
  • Diabetes patient jabbing themselves with insulin
    Worried About Insulin Shots?
    Persons with diabetes often get extremely stressed when their doctor wants to move them from pills to insulin shots. Dr Shital Patel allays the fears and explains what to expect and how to go about it. The transition from pills to insulin injections can be a worrying experience for many Diabetes Type 2 patients. You should know that this does not mean that your diabetes has worsened or that your Type 2 diabetes has changed to Type 1. You are being prescribed insulin because after…
  • FDA approves Trulicity a weekly injectable to treat type 2 diabetes
    The U.S. FDA today approved Trulicity (dulaglutide), a once-weekly subcutaneous injection to improve glycemic control (blood sugar levels), along with diet and exercise, in adults with type 2 diabetes. "Type 2 diabetes is a serious chronic condition that causes blood glucose levels to rise higher than normal,” said Mary Parks, M.D., deputy director of the Office of Drug Evaluation II in the FDA’s Center for Drug Evaluation and Research. “Trulicity is a new treatment option, which can be used…