Brief Answer:
It's because of normal cremasteric reflex
Detailed Answer:
Namaste
Welcome to Healthcare-Magic
Greetings of the day
Dear Mr XXXXXXX
It's quite common for many of the normal individuals to experience sense of fullness in testis because of stasis and congestion when they don't masturbate. It's perfectly normal.
Testis is placed outside the body cavity in a sac known as
scrotum to maintain it at lower temperature than the body temperature which helps in
spermatogenesis.
The scrotum is thrown into folds which increases the surface area to increase the heat dissipation. When the outside temperature is lower as being in water during swimming, the cremasteric muscle of scrotum contracts, it decreases surface area of scrotum decreasing the heat loss and also lifts the testis upwards towards the abdomen.The left and right reflex may not be symmetric so sometimes the right testis may be higher up.
This explains your symptoms which are perfectly normal reflexes present.
As you are having bilateral pain in testis it's important to rule out anatomical abnormality of the testis, as testis are important organs in males. Would suggest you to see your surgeon, physical examination and
ultrasound of scrotum will provide you the much needed reassurance that there is no problem.
In the meantime I would suggest you
1. Proper scrotal support - wearing the right size of underwear which is neither too tight nor loose will properly support the testis and help in relieving pain
2. Simple
analgesic like
Ibuprofen will be beneficial
I hope it helped
If you need any further assistance will be glad to assist you.
Wishing you happy and healthy life
Take care
Best Regards
Dr Deepak XXXXXXX
MBBS,MS,MCH
Consultant Surgeon