What is a common symptom of a urinary tract infection (UTI)?

A burning sensation during urination is a hallmark symptom of a urinary tract infection (UTI). This discomfort, also known as dysuria, occurs when the urinary tract becomes inflamed due to the presence of bacteria. As the infected urine passes through the urethra, the inflammation can cause a burning or painful feeling, making urination uncomfortable.

In contrast, the other options do not accurately reflect common symptoms associated with UTIs. For instance, while an increased urge to drink water may relate to other conditions or dehydration, it is not specifically tied to a UTI. Similarly, a decrease in urine output is not typical and can indicate other health issues. Lastly, an increase in urine pH may occur in certain conditions but is not a classic symptom of a UTI. Thus, the burning sensation during urination is the most relevant symptom in this context.