Thanks for all these additional details.
I can understand your concern.
Well, Bike riding can compress the prostate and stir up any possible bacteria in there, causing prostatitis. Your symptoms sound consistent with prostatitis.
It would cause dull pain in the testicle as the bacteria in the prostate can reflux through the vas deferens and infect the testicle as well, causing orchitis.
To treat, it you would need Antibiotics -- if the infection is caused by bacteria, Anti-inflammatory medications and Painkillers would be given.
You need to consult your doctor, for detailed examination of the scrotum, testicles, and penis. Also a A scrotal ultrasound should be done.
You need to undergo- Complete blood count, Urine test, Urine flow study for complete diagnosis.
You should wear loose undergarments, and avoid doing any exercises.
You should avoid bike riding, til you get this issue managed.
Please do not ignore your symptoms, and get it clinically evaluated by doctor.
Please make an appointment with Urologist for evaluation and management.
Hope this helped
If you have any further question then you can ask me.
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