Is it okay to lie about having a job to strangers?

Okay hear me out. Whenever I go for a haircut, or to the store, or any time I have to make small talk with someone I'm probably never gonna see again, they always ask "so what do you do for a living?"
I'm not working due to a disability. It's nothing obvious you could see by looking at me, so it's usually followed up by questions about what's wrong with me. It's awkward and it makes me and them uncomfortable and I don't want to tell a stranger my medical history.
I'm never gonna see these people again, can I just make up a boring job to keep the conversation impersonal? Or talk about jobs I had in the past and act like I'm still working there?
Is it okay to lie about having a job to strangers?
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