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Low Blood Sugar (Hypoglycemia)

Symptoms

How you react to low blood sugar may not be the same as it is for others. It's important to know your symptoms.

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Common symptoms may include:

Fast heartbeat.
Shaking.
Sweating.
Nervousness or anxiety.
Irritability or confusion.
Dizziness.
Hunger.

Hypoglycemia unawareness

You may not have any symptoms when your blood sugar is low (hypoglycemia unawareness).

If you don't have symptoms, it will be harder to treat your low blood sugar early. This increases your risk of having severe lows and can be dangerous. This is more likely to happen if you:

Have had diabetes for more than 5–10 years.
Often have low blood sugar.
Take certain medicines, such as beta blockers for high blood pressure.

If you meet one or more of the above and you have hypoglycemia unawareness, check your blood sugar more often.

Checking is especially important to do before driving or being physically active.

Causes

There are many reasons why you may have low blood sugar, including:

Taking too much insulin.
Not eating enough carbohydrates for how m