Nerve pain around the knee is usually due to nerve inflammation, nerve compression, or even nerve injury. There is a nerve around the knee called the common peroneal nerve, which is superficially located and easily damaged by trauma. If pain or numbness occurs after trauma, an electromyogram must be done promptly to rule out the possibility of nerve damage and to determine the extent of the nerve damage. Because of the superficial location of the common peroneal nerve, in addition to the possibility of trauma, there is also the possibility of compression by the body surface swelling, resulting in inflammation of the nerve, which may lead to compression necrosis of the nerve in severe cases. It is usually possible that the nerve may be affected by chondromas or by some surface masses, which may affect the nerve alignment and lead to nerve compression.