It is sometimes very difficult - I gave up trying to convince anyone and just started doing what I could (and what was most important to me) and ignoring the rest. It's not easy when they are harping on you to do more, or calling you lazy, wish I had a solution for that.
The only thing I know of that has helped anyone convince those who don't accept our limitations is "The Spoon Theory" /cdn.totalcomputersusa.com/butyoudontlooksick.com/uploads/2010/02/BYDLS-TheSpoonTheory.pdf
Maybe some of our other members have some thoughts?
Lynnwood, Lupus & Sjogren's Moderator, Dx: 2000DIAGNOSING LUPUS & HW's LUPUS 101
"Life is far too important to be taken seriously." - Oscar Wilde