Hello there. I can understand that you are concerned. But where have you seen the swelling? On which part? Also, how have you been able to see the nerves? Is it in the legs? If yes, then it could be varicose veins which is a dilatation of the veins and not nerves but anyways, since you have not provided proper history, only this much info i can give you. Best regards. Dr. Anil kumar jain.