Always Thirsty and Running to the Bathroom? What Are the Easily Overlooked Early Symptoms of Diabetes? What Are the 'Three Excesses and One Loss' Warning Signs of Thirst, Frequent Urination, and Weight Loss in Diabetes? Detect Diabetes Early Through Blood Tests!

Mon, 08 Jun 2026 17:55:00 +0800

Do you often feel thirsty, run to the bathroom constantly, or eat a lot but lose weight mysteriously?

Be careful, this could be your body’s metabolic system sending a distress signal.

What is the Most Typical ‘Three Excesses and One Loss’ of Diabetes?

The most classic early warning sign of diabetes is the so-called ’three excesses and one loss’. Because the blood sugar level is too high, the body tries its best to dilute and flush the sugar out, triggering a chain reaction.

Symptoms	Causes
Polyuria (Excessive Urination)	`kidneys` in order to excrete excess sugar, will carry away a large amount of water, resulting in a significant increase in urination frequency and volume (especially nocturia)
Polydipsia (Excessive Thirst)	The body sends out a dehydration signal after losing a large amount of water, making people abnormally thirsty
Polyphagia (Excessive Eating)	Although there is plenty of sugar in the blood, the cells cannot absorb the energy, and the `brain` mistakenly thinks you are starving, leading to a huge increase in appetite
Weight Loss	Cells lack energy, so the body has to burn muscle and fat instead, causing the weight to drop rapidly for no apparent reason

The blood is overflowing with sugar, yet not a single drop of energy can enter the cells.

This is why diabetic patients clearly eat a lot, yet still get thinner and more tired.

Besides ‘Three Excesses and One Loss’, What Other Symptoms Are Easily Overlooked?

Many people think that diabetes must present with obvious thirst and frequent urination, but Type 2 diabetes often has no obvious symptoms in the early stages.

The following ‘hidden warning signs’ are more likely to be ignored as stress, poor sleep, or aging:

Atypical Symptoms	Why They Appear
Easy Fatigue	Cells cannot get sufficient energy, leaving the person lethargic and lacking energy
Slow Wound Healing	High blood sugar damages blood vessel functions, preventing nutrients from reaching the wound, which drastically slows repair
Recurrent Skin Itching or Infections	High blood sugar lowers immunity, making the skin prone to dryness, itching, and fungal infections
Blurry Vision	High blood sugar affects the eye lenses, causing vision fluctuations
Numbness or Tingling in Hands and Feet	Nerve endings begin to degenerate because they do not receive sufficient blood nourishment
Darkened Skin on Neck or Armpits	An external manifestation of insulin resistance, medically known as acanthosis nigricans
Gum Inflammation, Periodontal Disease	High blood sugar makes the oral cavity more prone to bacterial growth, causing recurrent inflammation

If you find your body showing several of the above symptoms simultaneously, and they persist for a period of time without improvement, you should be alert.

Who is in the High-Risk Group for Diabetes?

Not everyone has the same risk of developing diabetes. The more of the following traits you have, the more you need to pay attention to your blood sugar levels:

Risk Factors	Explanation
Family History	Parents or siblings have diabetes, your genetic risk is significantly higher
Obesity and Excess Visceral Fat	This is the primary culprit behind insulin resistance
Lack of Exercise	Sedentary lifestyle reduces the muscles’ ability to utilize blood sugar
Poor Eating Habits	Long-term intake of high sugar, high oil, high calories, and refined starches
Age 45 or Above	As age increases, `pancreas` function gradually declines (though there is a younger trend recently)
History of Gestational Diabetes	Experienced high blood sugar during pregnancy, raising the risk of developing Type 2 diabetes in the future
Metabolic Syndrome	People who simultaneously have issues like high blood pressure and high blood lipids

Genetics determines the natural ’tolerance space’ of your pancreas, while lifestyle habits determine whether you will exhaust this space.

How to Confirm if You Have Diabetes?

If you have symptoms, don’t scare yourself, but don’t ignore them either. The most accurate way is to go to the hospital for a blood test.

Diagnostic Standards for Diabetes

Indicator	Normal	Prediabetes	Diabetes
Fasting Blood Glucose	< 100 mg/dL	100 ~ 125 mg/dL	≧ 126 mg/dL
2-Hour Postprandial Blood Glucose	< 140 mg/dL	140 ~ 199 mg/dL	≧ 200 mg/dL
Glycated Hemoglobin (HbA1c)	< 5.7%	5.7% ~ 6.4%	≧ 6.5%

The first three indicators must meet the criteria at least 2 times for diagnosis. If random blood glucose exceeds 200 mg/dL and is accompanied by typical symptoms (three excesses and one loss), a diagnosis can be confirmed with just 1 time.

Three Steps for Self-Testing

Steps	Explanation
1. Regularly Measure Blood Sugar	Use a glucose meter to monitor regularly, 1 to 2 times a week for stable levels, and at least once a day for unstable levels
2. Interpret Abnormal Values	Compare with the table above; if values fall in the ‘prediabetes’ range, seek medical attention promptly
3. Consistently Record Trends	A single value can be affected by the body’s condition that day, so the long-term trend is the most accurate basis

Do Not Ignore Subtle Changes in Your Body

The early symptoms of diabetes are like boiling a frog in warm water; by the time you clearly feel something is wrong with your body, the best window for intervention has often passed.

Discovering it one step earlier allows you to control it earlier and avoid irreversible complications.

If you are in a high-risk group or have recently noticed any of the above warning signs, you might want to actively request a fasting blood glucose and HbA1c test during your next physical checkup.

Taking a few minutes to draw a tube of blood might just protect you from decades of future health risks.

Diabetes Symptoms on Health TLDRLSS