How to express this: "The vein dislocated"

[Tom]

Hi

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.

[Mister Micawber]

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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.
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Native English teacher at Mister Micawber's

[Tom]

[Mister Micawber]

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Yes, both sound fine. I would probably use 'got' instead of 'had' in #1.
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Native English teacher at Mister Micawber's

[Yankee]

Hi Tom

You might be interested in this Wikipedia article (especially the second paragraph):
Charley Horse

PS
No, you should not say 'a strenuous pain'. The word 'sharp' is fine.
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"Nearly all men can stand adversity, but if you want to test a man's character, give him power." ~ Abraham Lincoln