Judy , I had and still have a serious health problem. This meant I missed ten months of work, and I can't tell you how bad it was when I went back. People wanting to know what medication I was on, watching to see if I put on or lose weight, but the worst was a breach by work of leaving absence forms in full view with private health stuff on it, at the time I was too ill to care.
But just to give you a laugh, I have my shopping delivered, and to be honest it's been a struggle as there are no bags, I have to get down to floor level, lift stuff out of crates and put away. My sister encouraged me to put a note on the delivery request asking for help by putting things out of the crate and into my own 'Trolley' bags so I can drag them in , less bending. I did this but just put down another health reason. Well the driver turned up, very helpful but at the top of his voice asking how I had the problem and what had I been doing to myself and was I off work etc etc. Although I hadn't put down my real health problem (Thank goodness) it was still intrusive. As you said, you can , if pushed talk to family and friends, but you don't want to discuss very personal issues with all and sundry, I know people are concerned and that's really lovely, if they do a cheery 'How are you or do you need any help' As for going further and asking the ins and outs and medications, treatments etc, that is just nosiness in my opinion ! I think you have to be ill first before you know how to treat others that are in the same situation !! However, not to tar all with the same brush, some people are respectful and concerned, so there's still hope for us all !!! Hope you feel better soon .