I have been thinking of asking this question for quite some time now–but, believe me, could not muster up the courage to do so. Sometimes it happens that while swimming or sleeping we get an extremely sharp (strenuous?) pain in the middle of our calf—as if the vein their dislocated. I hope someone of you have experienced that! I would really like to know how I can express that in formal English.
.
Veins do not dislocate, to the best of my knowledge; it sound to me as if you have a muscle cramp. However, this is a language forum, not a medical forum.
.