Hey, when I was like 12 or 13 years old I was playing on the slide trying to climb up it, you know trying to be cool any ways when I got to the top of the slide I decided to stand up and in my attempt I had fallen receiving tremendous force to my scrotum. At the time the pain wasnt severe it just hurt like hell. So I walked it off then afterwards I felt a little sore for a few days. Now being 18 i've noticed like a small ball attached to my right testi, it isn't painful or effect my daily life or sexual life in any way I was just wandering if this is something I should be concerned about or is it just the results of injury.

(any insights will help)