When considering UTIs in children, which of the following is a common symptom?

Bed-wetting, or nocturnal enuresis, can indeed be associated with urinary tract infections (UTIs) in children. When a child has a UTI, the infection can irritate the bladder, leading to increased urgency and frequency of urination, which may result in bed-wetting. This can be particularly noticeable in children who may have previously been dry at night.

In contrast, while abdominal pain can occur with UTIs, especially in young children who may not articulate their symptoms well, it is not as definitive a symptom as bed-wetting is. Rapid weight gain is generally not associated with UTIs and may suggest other medical issues. Similarly, excessive thirst might indicate other conditions such as diabetes rather than being a common symptom of a UTI. Thus, bed-wetting stands out as a relevant symptom linked to urinary infections in children.