This is Dr. David
have you been sexually active?
light brown flakes in your urine can be from blood in your urine which can be caused by bacterial infection in your urine
or can be due to trauma to your bladder or a small bladder stone or kidney stone
you need to get a urinalysis to check your urine checked for blood and infection.
if you have been sexually active and not taking your birth control pills regularly, you might need a pregnancy test depending on your age, but a few days most likely wouldn't cause you to be pregnant.
you might need to drink more water and fluids as well
if you are drinking caffeine or alcohol, this can also irritate your bladder and sometimes cause bleeding if you are not drinking enough water.
let me know if you have other questions.
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