I’m a 26 year old male. I don’t take any meds at this time.. I noticed a small plum like lump on my lower right side of back about a week ago also have leg pain on right side light to mild. I first noticed this when I would go to the gym doing heavy lifting for shoulders also dead lifts. Didn’t think of it as anything at the time.. But randomly out of know where I decided to feel my back and that’s what I found.. But this time I was doing another workout where u lay down and pull the weight over your head to your chest.