Our expert says:
No, not necessarily. A heel spur would not only hurt when stretched, but also during running. It might just be that you are inflexible in the calf, or that you are over-stretching the calf muscle. You have to get the appropriate diagnosis in order to know waht you need to do about it, because anything in this format is really just guesswork.
So if the problem persists and if you find that it affects your exercise (I'm not sure if you are affected unless you stretch it), then I'd say you probably need to see someone and have it diagnosed and then treated.
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