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Understanding Oliguria: Causes, Symptoms, and When to Seek Help

Oliguria is a medical term used to describe a decrease in urine output, typically defined as producing less than 400 milliliters of urine in 24 hours for adults. While it may seem like a minor physical change, reduced urination can be a sign of an underlying health issue that needs attention. Because urine output reflects how well the kidneys and the body’s fluid balance are functioning, oliguria often signals that something within the body is not working as it should.

Urine is produced when the kidneys filter waste and excess fluid from the blood. When the body becomes dehydrated, stressed, or affected by disease, this filtration process can slow down. One of the most common causes of oliguria is dehydration, which occurs when the body loses more water than it takes in. This may happen due to vomiting, diarrhea, excessive sweating,…