If pain is a signal, then it's often a car alarm that won't shut up. Even if someone is actually trying to steal the car, I only need to be told once.

Sometimes I get headaches. I don't know why. Maybe there's a cause. I do try things to fix the underlying problem. But it's not instant. While I wait for it, why should I continue to be in pain when the pain medicine is pretty much risk free if I'm not reckless with it?

It's strange that you'll take a painkiller for the sake of others, so you don't bother them by being grumpy, but you wouldn't do the same for yourself. Surely you also don't enjoy being a grumpy asshole even when you're alone.

I feel better avoiding the causes of making me grumpy, I end up feeling less tired at the end of the day.