Coming to think of it the people that do the massages often use that same word "knots" i did not mention it before because i thought it was just a variation of "ball" or "lump".

*Yes, its a very specific zone (the one pictured)

*No I do not feel pain.

*When I reffered to heavy feeling I think it would be wiser to describe this feeling as my legs just being tired... I think that is a more proper adjective.

* I have no stiffness (perhaps because its very specific)

Considering this, would you still be interested in the exams you pointed?
Would you still advise the best specialist for this is a neurologist? or some other?
In what sense can it be vascular related?

Thank you again for your kind attention...!!!