Counterexamples: scratching itches feels good but can damage the skin if overdone, and anyway IME it doesn’t help at all with recovering from mosquito bites and similar irritations; and after vomiting you feel thirsty but drinking water immediately afterwards would only make you throw it up too (IME at least). Yeah, and eating a lot when you already are plump enough, but everyone else has already mentioned it.
In all other cases I can think of, it’s good advice: for example, I heard that when you have a fever you should cover yourself up when you feel cold (because your body needs your temperature to be higher) and uncover yourself when you feel hot (because your body no longer needs that).
Counterexamples: scratching itches feels good but can damage the skin if overdone, and anyway IME it doesn’t help at all with recovering from mosquito bites and similar irritations; and after vomiting you feel thirsty but drinking water immediately afterwards would only make you throw it up too (IME at least). Yeah, and eating a lot when you already are plump enough, but everyone else has already mentioned it.
In all other cases I can think of, it’s good advice: for example, I heard that when you have a fever you should cover yourself up when you feel cold (because your body needs your temperature to be higher) and uncover yourself when you feel hot (because your body no longer needs that).