Hi!
Sorry for delayed replay.
In most cases testicular cancer is represented as a painless lump or mass in the testicle and that leads to changed shape. Scrotal enlargement or swelling is also common. A sensation of heaviness in the scrotum or lower abdominal aching can be experienced, too.
You should keep in mind that some of these symptoms may be caused by other conditions, such as testicle injury or testicle infection.
I'll suggest you to visit urologist.