You may believe that having high blood sugar is noticeable, but symptoms of high blood sugar can pass under the radar. Many people need to be aware of their high blood sugar; there are others if this is your situation.

A concentration of extra glucose in the circulation causes high blood sugar. Diabetes patients are more likely to be concerned about this than non-diabetics.

If left uncontrolled, a dangerous sugar level in blood can lead to serious health complications.

With that in mind, this article will show you the signs of high blood sugar and the dangerous sugar level in the Blood.

Read Also: Questions to ask if Blood Sugar is Out of Control

What is high blood sugar?

High blood sugar occurs when the Blood has an abnormally high sugar (glucose) level. It is sometimes referred to as high blood sugar. This occurs when the body has insufficient insulin (a hormone) or cannot effectively utilize insulin (insulin resistance).

High blood sugar typically indicates diabetes, and persons with diabetes might suffer hyperglycemia episodes regularly.

If you have untreated high blood sugar for a prolonged period, it can harm the nerves, arteries, tissues, and organs.

High blood pressure can also cause an acute (sudden and severe) life-threatening consequence known as diabetes-related ketoacidosis (DKA), which is more common in those who use insulin or have undiagnosed Type 1 diabetes. 

How to know if you have high blood sugar?

The high and dangerous sugar level in blood can result in nerve damage, kidney disease, and heart disease. It can also cause a variety of additional symptoms and consequences. They are as follows:

High Blood Sugar Symptoms


If the blood sugar levels are high, the kidneys excrete the extra sugar, leading people to pee more often. Frequent urine that is urgent enough to wake people during sleep can be one of the early warning symptoms of diabetes.


Important fluids will be drawn from the tissues when the kidneys work overtime and urinate people more often. One would feel thirsty all the time if one urinates often.


When the blood sugar level is elevated, the body functions hard to eliminate the extra sugar. This process not only harms health but also changes the way that the body processes glucose for energy.

Weight loss

High blood sugar levels might cause unexpected or rapid weight loss. It happens when the body’s cells aren’t getting enough glucose, so the body turns to fatty tissue and muscle for energy instead.

Blurred vision

High blood sugar levels can affect the tiny blood vessels in the eye, leading to a swollen lens and impaired vision. When the blood sugar levels increase and fall, the eyesight can improve or worsen.

Extreme hunger

When the body expels a lot of glucose from the diet, people may experience increased hunger.

Discoloration of the skin

Insulin deficiency can cause black patches of skin to appear in the folds of the neck, underarm region, or groin. The darkened skin may seem elevated and velvety.

Numbness or tingling

Numbing sensations, burning, or tingling in the hands, legs, and feet can also be caused by high blood sugar. It has a substantial effect on nerves. The damage might begin with tingling or numbness and progress to pain or neuropathy.

Mood swings

Assessing the impact of high blood sugar on mood is difficult to quantify, but many people with diabetes self-report that significant variations in blood sugar, high or low, can induce mood and behavior problems.

Yeast infections

The extra sugar in the Blood and urine provides yeast a great habitat. Yeast may feed on excess sugar in the vaginal region, lips, and armpits. Controlling blood sugar levels can help lower the chance of developing diabetes.

Read Also: 6 Superfoods to Control Blood Sugar

What is the dangerous sugar level in Blood?

What is the dangerous sugar level in Blood

High blood sugar levels are dangerous. A blood sugar level of more than 200 mg/dL anywhere at the moment is regarded as extremely high. 

Very high blood sugar levels in type 1 diabetes can result in diabetic ketoacidosis, a potentially fatal illness (DKA).

DKA develops when insulin levels are extremely low, causing the body to generate ketones to utilize as fuel rather than glucose. Fruity-smelling breath is an indication of the presence of ketone bodies. Since DKA can be lethal, immediate medical intervention is essential.

  • As stated by the University of Michigan, a value of over 300 mg/dL in a series can be dangerous. 
  • If you get 2 or more readings above 300 mg/dL in a row, seek medical care immediately. In severe cases, extremely high blood sugar levels (much beyond 300 mg/dL) might result in a coma.
  • A high blood sugar level is between 180 and 250 mg/dL. Low blood sugar is defined as less than 70 mg/dl.
  • A blood sugar level of 250 mg/dL or less than 50 mg/dL is hazardous and needs immediate medical attention.
  • The ideal blood sugar level to aim for is usually between 70 and 130 mg/dL.

Why is maintaining healthy blood sugar levels essential?

A healthy blood sugar level is important for overall wellness. If blood sugar levels are high, the entire body suffers.

The longer you have high blood sugar (chronic high blood sugar level or diabetes), the more likely you are to develop problems. That’s why controlling blood sugar levels in diabetics is the most important objective. Low blood sugar levels are also dangerous.

Keeping appropriate blood sugar levels might help lower the chances of having diabetes later in life. Individuals with a higher chance of developing diabetes should pay close attention to their blood sugar changes and get evaluated for both types of diabetes regularly.

How can you prevent your high blood sugar?

  • People with high blood sugar should monitor their sugar levels and take the recommended insulin dosage.
  • Please consult a doctor or a nutritionist about which foods to consume or avoid, how much to eat, and how frequently to eat them.
  • Take steps to avoid infections, such as frequent handwashing, because sickness, including a cold, can cause a rise in blood sugar levels.
  • They should plan their food consumption and exercise to regulate blood sugar levels.
  • Reduce stress as much as possible, for example, by exercising, getting adequate sleep, and engaging in stress-relieving exercises, including meditation or yoga.

Conclusion –

If sugar cannot be used for energy and instead accumulates in the Blood, the body attempts to compensate. Diabetes patients frequently have high blood sugar levels. 

While the body achieves this, people may feel high blood sugar symptoms such as increased thirst, hunger, and urine. Other symptoms, including weight loss, blurred eyesight, skin issues, and recurrent infections, may appear less noticeable.

Understanding that high blood sugar doesn’t have to be a chronic condition is critical. You should be aware that there are things that may take to avoid it. 

Unmanaged and consistently high blood sugar levels can be life-threatening, making it crucial to maintain healthy levels.

Speak with your healthcare practitioner if you’re feeling overwhelmed by diabetes management. You can work together to develop a strategy for achieving the management objectives.

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