I have had a pain around my left testicle for two weeks, I have an appointment for the doctors, the testicle itself is smoothe no lumps and is spongy, one of the veins or sperm vessels feels as though it has a small piece of grit inside it which is very difficult to locate each time, it feels like a tiny stone smaller than a pin head. I get a dull ache when sitting for long periods, which is relieved upon standing. Will it be possible to pick this up on ultrasound, I doubt my doctor will be able to locate it by feel as it takes me an age to find it.