What sign is most likely exhibited by a child with acute glomerulonephritis that motivated parents to seek medical care?

Hematuria, or the presence of blood in the urine, is a hallmark sign of acute glomerulonephritis, which is an inflammation of the glomeruli in the kidneys. This condition can arise after infections, particularly streptococcal throat infections, leading to kidney complications. When parents notice that their child’s urine appears pink, red, or cola-colored, it often raises immediate concern and prompts them to seek medical evaluation.

While other symptoms like frequent headaches, fever and chills, or general fatigue and weakness may occur with various illnesses, hematuria is particularly associated with kidney issues such as glomerulonephritis. The visual aspect of the urine changing color typically captures attention and signals a potential serious health issue, making it the most motivating factor for parents to seek medical care.