I have a ton of these, but most recently had a teen patient who had lost speech for a couple days. They got better, and when I saw them again with their mom I went over the tests we had done and started discussing some of the possible causes. Mom interrupted me and said "Don't say anything else. I'm a firm believer that if you don't tell someone their diagnosis they can just heal on their own."
Literally didn't want me to tell her anything because she thought saying words out lout would give her kid diseases.
Oh, same day I had a lady tell me that she was refusing treatment because she read a "study" where a guy treated "hundreds and hundreds of patients" with normal saline and had a 100% success rate. Yeah, ok lady.
My friend is treating her Lyme disease by going to a chiropractor, using essential oils, and getting massages, obviously against her doctor’s advice.