Hello I am 27 and I have a similar story, with pain in my right testicle when I sit down, yet related to varicose veins.
I have varicose veins on both my legs, and over the last year or so I occassionally felt pain in my right testicle when I sat down with tighter shorts / trousers / underwear. Pain occured about every 2 weeks. I went to check if I had varicocele by an ultrasound scan about a year ago and nothing was found. The doctor inspected and also couldnt find anything.
I was strongly convinced that this pain must be related to the varicose veins, which are slowly getting worse with age, as so was the pain in the testicle becoming more frequent. So I decided to get the vein in my right leg removed.
2 days ago I had the varicose veins removed in my right leg (using a local anestetic, local injections around the vein and a lazer to burn it out). Vein removed from knee up to the groin area. I had hoped that this would help with the tesicular pain, however it has done the opposite. Now, every time I sit down I feel pain in my right testicle. I went to the A&E last night for a doctor to see it (in case it was a post surgery blood clot or something) yet I was just told to take some pain killers and go home. Urine sample was clear and nothing was found.
Although the foot and leg will probably feel a lot better due to the operation, I deeply regret doing it as it has worsened the testicle pain. It is only 2 days after the surgery, I hope that this pain will gradually leave.
I have a desk job so I am also deeply concerned how things will be when I return to work.
I hope this will help anyone in a similar situation who is considering surgery. And thank you guys for sharing, im glad to hear that Im not alone in this.