Have you tried using a ball softer than a lacrosse ball?
A Yoga Tune Up ball is a great option. In a tender area a lacrosse ball is too hard and your muscles and tissues can’t relax and absorb the work you are doing.
Have you had anyone smash the area for you?
Have you used a barbell to smash the area on all sides of your arm?
You may not have pain in the shoulder or wrist, however, you may have restrictions in those areas. Pain is a lagging indicator. Are you doing any mobility for those areas? Looking up/down stream of where you see the problem. Where you see this problem isn’t always where the problem originates. You can buffer things for a time until you can’t any more.