#1 Only the old get sick:
Illness does not discriminate.
We are fair game.

#2 Looks reflect feelings:
If you bumped into me in the street, you would not think that I was suffering.
I may appear to be okay, maybe a little tired, but on the inside my muscles are aching, my head is spinning, my stomach is churning.
What needs to be known is that I can leave my house looking decent, but feeling absolutely terrible.

#3 Stress reduction techniques cure illness (ie exercise, meditation, yoga):
When people hear that you are unwell, they assume that the things that usually provide average people with a better wellbeing, will help you. This includes Exercise, Meditation, Diet Change, Juice Cleanse & Detox, Yoga etc.
This is incorrect. I encourage the Chronically Ill to try these, as they may provide a temporary relief for symptoms, but they are not a cure!