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.
Peripheral neuropathy, a result of damage to your peripheral nerves, often causes weakness, numbness and pain, usually in your hands and feet. It can also affect other areas of your body. Your peripheral nervous system sends information from your brain and spinal cord (central nervous system) to the rest of your body.