Thanks for your query.
I would like to know a little more about your condition to answer you better.
- Since when did you notice this?
- Did you have any fever
before you noticed this?
- Is there increase in size of the testicles?
Since you do not have pain and discomfort, it is very unlikely of infective pathology. It could be a simple Hydrocele
. You have to consult a surgeon, who will examine you and carry out test of fluctuation and illumination against light. This can confirm the presence of fluid around the testicles. Please get your routine urine and Blood test
In case you have any doubt please do not hesitate to ask me.