I can understand your concern for the Swollen areas on testicles.
It appears form your query that after hernia
operation you have developed herniation of some part of omentum which is covering of intestine which is giving small lump like appearance of the area. This area is quite common to get strangulated and intestinal obstruction
because of narrow passage.
Do not try to even touch or pinch the area as can cause more aggravation of the problem and spread of the infection.
For time being period you can take pain killer tablets such diclofenac
You must meet a surgeon or any family physician and get a proper treatment without delay.