Welcome. You will find this site very informative. Hopefully, you will find many answers. I only joined recently, and it has been so helpful to me to know that there are many other people with this condition. Also, there are people researching the condition, which will be helpful to all of us.
I am not an expert, just unfortunate to have had this condition for at least 12 years. Two of my episodes were after air travel. Two were after either surgery or major illness. I do not tolerate heat or sunshine well. . People more knowledgeable than I have been very helpful to me.
Mary Eileen