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Your first reference points out the difference between a lateral ankle view versus an oblique view. The oblique view is taken from a lateral position but the joint is tilted so that the rays travel parallel to the joint surface. Otherwise, a lateral view results in superimposition of different parts of the joint being imaged rendering it unclear.
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Not neccessarly. If you're in acute pain then you should definitely go to the doctor or emergency room.
But I've recently overexerted myself biking and jogging and it took about 5 days for my aching calf muscles to get back to normal.
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Veins pop out when the muscles are strained.
https://www.scientificamerican.com/article/why-do-veins-pop-out-when/
Muscle builders try to get them popping out with constraining the blood flow by tying something to their arms. The compression socks and pantyhose may work in a similar way.
http://www.wikihow.com/Get-Veins-to-Pop-Out
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