Talk to Urologist on Uro Issue

hi plz guide this happens very rarely what could be the solution mae jab b pant pehen k sota hu raat ko tou adhi raat ko i feel mera right testicle jis nerve ya vein sy connected ha wo swell ha i even checked it by touching wo swell feel hoty ha] this doesnt happen when i wear trouser or shalwar qameez ye kya issue ho sakta ? should i go for usg? recommend me cost friendly place for usg and environment friendly as i feel hesitate to go for it