hello and welcome..any swelling or lumps to the testicle need imediate attention so my advise it see a doctor or visit you nearest er as soon as possible.
It could just be a cyst or ingrown hair but it could also be something more serious.
We are not here to scare you but to give good sound advise as we are not doctors.
I wish you luck and please get this seen to without delay.
Thanks for yours reply. I went to a doctor and he examine and he said its not cancer.But he suggested me to do a Ultrasound for it.But the bad news as that i don't have insurance and you know in USA. it cost more than i was wiling to pay.So to be honest i cannot afford it ..so i will wait until i can afford .