Hemarthrosis is the medical term for bleeding in a joint. When you have pain and swelling in a single joint (monoarticular), hemarthrosis is a common cause. It is a cause for concern not only because of the pain, but because prolonged blood exposure can damage the cartilage.
Injury to the peripheral nerve (nerves outside of the brain and spinal cord) may result from blunt force, fractures, crush injuries, stretch, penetrating or cut injuries. The nerves of the upper limb are the most commonly injured. The healing process from nerve injury can take from a few weeks to a few months.
Nerve damage heal: There are different type of nerve damage. If it is just demyelinating injury (damage the peel of nerve), it would need a few weeks to heal after the etiology removal. If axonal damage, the nerve need regrowth from spine about 2-3 mm per day if the pathway soft tissue (frame of nerve) is still intact.