Doctor, I have had a dull heaviness and mild swelling behind my left testicle, mostly at the bottom/back. The swelling improves when I lie down and sometimes feels a little better with a supporter, but it does not completely go away. It can worsen with standing or tight clothing. My ultrasound and urine tests were normal, and I do not have pain, redness, or fever. I’m concerned because the heaviness and swelling have persisted for some time.”