7. Bladder Injury
Just as a kidney injury might cause bleeding in the urine, so too might damage to the bladder – which of course is where urine is stored.
If anything like this is causing the blood however, then you are likely to have noticed it at the time and you should problem notice other symptoms too – such as pain when touching the area, pain when bending or exerting yourself and potentially poor function that could manifest as urgency (the need to pee) or other symptoms.