ur post makes no sense to me
His post probably means, it is a waste to see a doctor for small
ailments, but you never know when the small ailment is a sign of
something major.
Generally I would say, when in doubt, seek medical advice. Or
when recovery takes an unusually long time, seek medical advice.
(and not post in the forum e.g. "HELP! My wound is festering! What
should I do?")