Physical injury is one of the most common causes of damage to the nervous system.
blood in legs
Car crash
Most commonly a traumatic injury.
There are three main causes of cows teats becoming blocked. These are: Injury, mastitis, and inherited. Injury and mastitis are both the most common reasons. They are painful and can be prevented.
Frequent bouts of coughing sometimes causes subconjuntival hemorrhage
earthquakes that produce more horizontal
The most usual cause of blood in the urine is a kidney stone.
Anemia has multiple causes, the most common of which are 1) iron deficiency anemia, and 2) blood loss anemia. There are many, many other causes, as well.
Most common cause is joint inflammation
It's most likely due to fibrous scar tissue from arthritis or and old injury.
There are a number of things but stress and pregnancy are most likely