What exactly is hypoglycemia (low blood sugar) and what symptoms should diabetes patients watch for?

Hypoglycemia simply means low blood sugar, usually defined as a glucose level below 70 mg/dL. It is one of the most important things to understand if you are using insulin or insulin-increasing tablets.

Why hypoglycemia happens

• Too much insulin or insulin-stimulating tablets.
• Skipping or delaying meals.
• Eating less than usual.
• Unplanned heavy physical activity.
• Kidney or liver disease, where medicines stay longer in the body.

Common early warning symptoms

These happen because the body releases stress hormones when sugar falls:

• Sweating
• Shaking or tremors
• Palpitations
• Sudden hunger
• Anxiety or restlessness

Later or more serious symptoms

These happen when the brain does not get enough glucose:

• Dizziness
• Confusion
• Blurred vision
• Slurred speech
• Extreme weakness
• Drowsiness or loss of consciousness

What if you do not have a glucometer

There is a practical bedside rule many doctors teach:

• If you have typical symptoms and they improve quickly after taking sugar, it was very likely hypoglycaemia.
• For example, if sweating and shakiness settle within 10 to 15 minutes after taking glucose, sugar water, or a sweet drink, low sugar was the cause.
• If symptoms do not improve or keep worsening despite taking sugar, think of other causes and seek medical help.

Who should be extra careful

• People on insulin.
• People taking sulfonylureas.
• Elderly patients.
• Those with kidney disease or liver disease.
• People who had previous severe hypoglycaemia.

Simple safety advice

• Always carry a quick sugar source.
• Do not skip meals.
• Learn your personal warning symptoms.
• Inform family members about signs of low sugar.

Hypoglycaemia is preventable and manageable when you recognise it early.