There are times when you may notice that you are going to the bathroom much more often. This is natural if you have drunk a lot of water or coffee on a particular day.
The problem arises when not only the frequency increases, but also the amount each time, and you feel intense thirst, constantly seeking water. If this continues for more than a few days, it is advisable to also check your blood sugar or kidneys.
Frequent Urination vs. Increased Urine Volume
These are different issues. Frequent urination (빈뇨) is when you feel the need to go to the bathroom even when your bladder contains only a small amount of urine. Increased urine volume (다뇨) is when the total amount of urine produced in a day increases.
Frequent urination is often associated with urinary tract issues such as cystitis or overactive bladder, and may be accompanied by pain, a feeling of incomplete emptying, or a sudden urge to urinate. On the other hand, if both frequency and volume have increased, beyond just drinking a lot of water, it is important to consider blood sugar levels or any medications you may be taking.
When Sugar Leaves the Body
When blood sugar levels rise significantly, glucose exits the body through urine, drawing water with it. This leads to an increase in urine volume, and the body feels thirsty to compensate for the fluid loss.
If your thirst persists even after drinking water, and you experience increased urine volume along with weight loss and easy fatigue, it may be time to check your blood sugar. However, not everyone who urinates frequently and feels thirsty has diabetes, so symptoms alone cannot be conclusive.
Reviewing with Your Health Check-up Results
If you have recently had a health check-up, it would be beneficial to review your fasting blood sugar, kidney function, and urinalysis results. If your blood sugar was high or there was a suspicion of diabetes, additional blood tests can confirm your current condition.
The kidneys are responsible for maintaining the body's water and electrolyte balance and filtering out waste products. If changes in urine volume persist, it is appropriate to consider not only blood sugar but also kidney function, any medications you are taking, and your daily fluid intake.
Reviewed by: Dr. Kim Seonhoo · Gastroenterology Subspecialist, Digestive Endoscopy Specialist Last reviewed on 2026-09-02
This article is intended to provide general health information, and the cause and necessary tests may vary depending on individual circumstances. If symptoms persist, please consult with a medical professional for diagnosis.