Pain - how do you tell if your human is in pain?

Dear George,
I am looking after an elderly human who has some health problems. I am finding it difficult to know when she is in pain. Obviously when we cats are in pain, we hiss, scratch or bite if somebody tries to pick us up. She doesn't do any of this when I crawl up the bed and sleep close to her. However she does make odd noises - sort of intakes of breath, wimpers and yowling noises. Is this pain?
Yours worried
Annie

Dear Annie,
Humans show pain in a different way to us. Apart from scratching or biting when being picked up, we stay silent. We don't make crying noises when in pain. That's because Nature has designed us to stay quiet in case a predator hears us and kills us. Look at it this way, a cat who cried loudly after a car accident would pretty soon be eaten by a fox here in the UK.
We are much much more stoic than humans, who really are pretty wimpish - another sign of their innate inferiority. We usually just go very very still - stay in our beds quietly resting, may not eat, and possibly have to pee outside the litter tray if it is too far away or too difficult to get into.
Humans are noisy and show their pain in their faces. You will see her face sort of twist up. She may have an intake of breath, as you have noticed. Some humans even shout, swear, yelp or cry. Poor creatures. Just not brave enough in the face of adversity.
There's not much you can do for her anyway, Annie. Go carefully on the bed, so that she isn't tempted to push you off. Purr loudly. That really helps a human who is lying unable to sleep. Purring acts as a kind of therapy for them. We have a responsibility to our pets so try to be helpful, even if you despise her lack of courage.
Love George