How do you treat. . .

Several times a week I get questions similar to these: “Just off the top of your head, what can I do for my problem of ________.” “Can you just “do your thing” and tell me quickly (without an exam) what is causing ________.” “Do you know what causes _________?”
“Will this product work for (e.g.) arthritis? or for toothaches, or headaches, or back pain, or fibromyalgia, or …. (Work for whom? I’m thinking.)
“Michael, could you ask your wife what she would do for_______.” Here are about 100 questions that go through my head when someone asks me something like this.