I've tried it a couple times, but I tend to be wrong, for example what I thought might be carpal tunnel turned out to be thoracic outlet syndrome.
The internet really is much more useful for finding more information after you're diagnosed, than finding a diagnosis.
Mostly I just scare myself & then the symptoms go away on their own.
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"[English] not only borrows words from other languages; it has on occasion chased other languages down dark alley-ways, clubbed them unconscious and rifled their pockets for new vocabulary."
-James Nicoll, can.general, March 21, 1992