What is a common symptom of post streptococcal glomerulonephritis?

Hematuria is a common symptom of post-streptococcal glomerulonephritis, which typically occurs following a streptococcal infection, like strep throat or skin infections. In this condition, inflammation of the glomeruli in the kidneys leads to the presence of red blood cells in the urine. Patients may notice dark, tea-colored urine or blood when urinating, which is a direct result of the kidney's impaired filtering ability due to the inflammatory response.

In contrast, weight gain, while it can occur due to fluid retention related to kidney problems, is not a definitive or specific symptom of this condition. Hypercalcemia is not typically associated with post-streptococcal glomerulonephritis and relates more to disorders of calcium metabolism. Likewise, jaundice, which indicates liver dysfunction, is unrelated to glomerulonephritis caused by streptococcal infection. These alternatives do not capture the specific renal manifestations that characterize post-streptococcal glomerulonephritis, making hematuria the most appropriate answer.