Doctor Amir Khan has shared five surprising factors that could spike your blood sugar levels that don’t include food
A doctor has revealed five “surprising” factors that could cause your blood sugar to rise – and none of them involves eating. In certain situations, this might not necessarily be a “bad thing”, he explained.
Blood sugar, or glucose, serves as the body’s main energy source, derived from food and controlled by insulin. Having excessively high or low blood sugar levels can pose different health dangers.
Refined carbohydrates, sugary snacks, or oversized portions are well-known culprits for causing blood sugar levels to increase. Yet, these aren’t the only potential causes.
In a video uploaded to his Instagram page, Doctor Amir Khan highlighted some “surprising” causes behind blood sugar spikes. Dr Amir, widely recognised from his ITV appearances, explained: “Did you know your blood sugar can spike even if you haven’t had a single bite to eat?
“Let me share five surprising things that can raise your blood sugar and why it might not always be a bad thing.”
Stress
Many people don’t appreciate the physical toll stress takes on the body. Dr Amir said: “Number one, stress. When you’re stressed, your body releases cortisol, the fight or flight hormone. That tells your liver to release stored glucose to give you energy.
“Great if you’re running from a tiger, less helpful if you’re just stuck in traffic. Remember, chronic stress equals chronic glucose spikes, and that is not good for long-term health. “
Poor sleep
Difficulty sleeping can trigger additional problems too. Dr Amir explained: “Number two, poor sleep.
“One bad night, your body becomes more insulin-resistant. That means glucose hangs around in the blood for longer.”
He cautioned that over time, inadequate sleep might even raise your chances of developing type 2 diabetes.
Exercise
This isn’t necessarily harmful, Dr Amir noted. “Certain types of exercises, especially intense or resistance training, can temporarily raise your blood sugars,” he explained.
“Why? Well again, it’s your body releasing glucose for fuel, but really importantly, long-term exercise improves insulin sensitivity, meaning lower blood sugars overall. So this is not a bad spike.”
Infections or illness
Again, this can be the body’s way of trying to stay healthy. Dr Amir said: “When you’re fighting off a bug, your immune system has to ramp up and that comes with a glucose surge. It’s your body’s way of fuelling the immune response.
“People living with diabetes often notice higher blood sugar levels when they’re unwell. That’s totally normal and they may have to adjust their medication accordingly.”
Hormones
His concluding piece of guidance was directed at women. Dr Amir said: “Ladies, this one’s for you because it’s maybe around your periods or the menopause. In the second half of your menstrual cycle, that’s the luteal phase, progesterone levels rise.
“This can make your cells more insulin resistant, meaning higher blood sugars, and of course, the perimenopause and the menopause oestrogen levels decline and that comes with insulin sensitivity dropping.
“So you become more resistant to insulin, leading to more frequent spikes in blood sugar. That’s why women in their 40s and 50s may notice weight gain, fatigue or brain fog, which can be linked to blood sugar shifts. “
He continued: “So remember, not all blood sugar spikes are bad, context matters. But if you’re seeing high readings and you’re not sure why it’s always worth talking to your doctor and not always about what you’re eating, knowledge is power.”
If you’re worried about your blood sugar levels, contact your GP for advice.

