With many of the invisible disabilities that we have to put up with, outsiders are often suspicious or resentful that we are getting money for nothing, that we are scoungers if not outright fraudsters.
For sure they would not want to be in our position but unless absolutly nessecary why discuss your problems and benefits with people that don't need to know ?
To claim PIP your condition needs to affect you for the majority of time. If an outsider only sees you when you have a good day then it can easily lead to misunderstanding