Brief Answer:
It can be some aneurysm or hernia in progression

Detailed Answer:
Hi! Welcome to health care magic!

Thanks for sharing your concerns with us. We will try to help you in best way possible.

Based on the history you have shared, it appears to be due some Aneurysm into this area. Vessels to whole leg pass through narrow canals in this groin area. Any abnormality, plaque, clot or wall abnormality in the vessels walls can be felt like vibrations when blood passes through these. Even small hernia or tissue walls deficiency or weakness in this area can cause underlying structures to press on the vessels leading to such vibrations.
In any case, Get an ultrasound of this area with doppler flow studies and you will get a clear diagnosis.
Wishing you good health. If you have any more questions, feel free to ask. Regards.

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Brief Answer:
No..it can wait

Detailed Answer:
Hi! Thanks for such encouraging remarks. No it is not an emergency and can be done routinely however if left leg starts to get colder compared to the other one or painful then it is needs emergent workup to rule out any compromise in the blood supply to that leg. Otherwise it is a routine workup. Wishing you a great health. You can reach me directly through my profile, in case of any more queries on future. Regards.

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