This should be cartilage hyperplasia, but there is no way to go on for a short time (unless you have surgery, obviously you won't do that), but since you don't have a fracture now, and according to your age, it has just begun to develop, so the hyperplastic part has not fully grown up. As long as it is not bad in the future, the proliferated part will be absorbed by itself in a few years. As long as you insist on not breaking off or pinching, rubbing and the like will stimulate the movement of this part. Just fine:)