I get a pain in my left lower groin area when standing for long priods - 3 to 4 hours. It then starts to feel as if I've been hit on my left testicle. When I press the area of pain I can feel/hear a type of wind sound like when you get trapped air in your ears in a plane. Ok, I sit down for several hours and the pain goes almost immediatly, but the area is still tender. Any ideas?