Hi, Uncle Bob. Welcome to the forum.

What ancestry are you? Autoimmune diseases are prevalent in those of Northern European ancestry (England, Germany, Ireland, Norway, etc.).

Some things such as stress, surgery, infection, etc. can bring on an autoimmune disease, but you need the right genes usually to have a particular disease (look up HLA typing).

Even if you found a reason why you have MG, reverse engineering it would be impossible. At least not yet.

I know that it's hard accepting that you have a disease, especially one that is so unpredictable. If you can spend some time learning about MG, that would help.

www.myasthenia.org
www.mdausa.org

There are some drugs that can make MG worse. Also, being out in hot weather will make MG much worse (or being overheated due to infection or a hot shower).

I hope you can get used to having MG and get the best treatments for it.

Annie