How long does it take for a brain bleed to show up on a CT scan?

A brain bleed can often be detected on a CT scan within minutes to a few hours after the onset of symptoms. However, the visibility of the bleed may depend on its size, location, and the timing of the scan. In some cases, very small or subtle bleeds might take longer to become apparent. It's crucial for medical professionals to evaluate the patient's condition and symptoms to determine the appropriate timing for imaging.