Describing a disability, disease or disorder to someone who doesn’t understand it can be tricky — particularly if the condition isn’t common or visible. Overly scientific descriptions aren’t usually easily understood and ignoring the topic entirely isn’t an option.
Some great informative and creative descriptions here, covering a wide variety of disabilities, eg:
“My son has apraxia, which I explain [like this]: ‘It’s like a marble in a drain. Sometimes the water can pass, other times it gets stuck.’ His speech processing is exactly like that.”