While Christine, who wrote the Spoon Theory, suffers with Lupus, the theory is applicable to all "invisible" diseases. The first time I read this I just sat and bawled; it fit so perfectly. I printed it out an took it to Alex who was laying in bed, low on "spoons" and we cried some more. I wanted to print it out and send it to everyone I ever met. I hope you will take the time to read it.
In the Cushie Community we reference "spoons" on a regular basis: "I'm low on spoons", "do you have any extra spoons?", "I don't think I have enough spoons to make it through today". If you've ever heard of anyone talking about spoons as if it's some code language, now you will understand.