Can anyone explain to me how a renal contusion, gross hematuria, and pain happens after a physical attack?

Renal contusion: Significant force is required to injure the kidney. Mvc's, falls, direct blows, and lower rib fractures are common mechanisms. The kidney is a heavily vascularized organ. When it is damaged, vessels break open, resulting in a parenchymal contusion and bleeding into the collecting system, which leads to the bladder and urethra. Nerve endings exist in kidney and surrounding tissue, resulting in pain.

Here are some: The one with the described scenario can be safely monitored and followed with rest and healthy lifestyle depending on the timing after the accident. It is caused by speedy shaking-up and impact to disarrange the kidney tissues, and diagnosed with Hx, physicals, imaging studies - usually CT.IVP. So, ask Doc timely.