Hi and welcome to HCM. Thank you for your query.
It can be damaged nerve
but this is probably artritis or bursitis
caused by hyperfunction of elbow and is usually found inn sportsman and people who use this joint too much. You should rest,keep you arm elevated, apply some ice for 10 minutes and take antiinflammator nonsteroid painkillers. If this persist you should do elbow xray exam to rule out bone damage.
Wish you good health. Regards