system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why does pee foam when it hits the ground outside.
gpt
Foamy urine can be caused by rapid urination. At times, when you delay going to the washroom, large amounts of urine gets collected in the bladder. Also, proteinuria or presence of significant amounts of protein in the urine, is one of the most common cause of foamy urine.