Information about this condition is quite widely available, here is what the NHS
have to say about it. In a nutshell, it is a condition that causes someone to sweat much more than the usual level which I seem to remember reading somewhere a while ago is up to a litre a day. Interestingly none of the information on the NHS page applies to me, not the reasons for the sweating or the possible causes. I had a little more luck on the Hyperhidrosis UK
website where they at least mention some of the areas I tend to sweat the most, for instance, the back. But on their list of other conditions that can cause it, they do not list Fibromyalgia and yet the Internet Search engines are full of people discussing the link.