Can be due to nerve related cause.
Thanks for trusting us with your health concern.
The intermittent pulsatile sensation in the testicle with no other symptoms can be a physiological variation and a harmless finding but the causes that need to be ruled out are- nerve impingement or pudendal nerve inflammation
and piriformis syndrome
Avoid activities like prolonged sitting jogging bicycle riding etc and see if the sensation improves.
It is best to consult a neurologist
for examination and related investigations in case the pulsation persists.
Please feel free to discuss further. I will be glad to answer the follow up queries that you have.
Wishing you good health.
Dr. Rakhi Tayal.
For future query, you can directly approach me through my profile URL http://bit.ly/Dr-Rakhi-Tayal