Interesting thread!
I too have the sweating, particularly on my head - only when I should be sweating, if you see what I mean, but excessive! I haven't noticed any stains.
I also think my body odour has changed a bit - become slightly acrid. I'm going to change my washing liquid (for my clothes) to see if there's a reaction between my present liquid and my sweat.
As for feet - I have no numbness in mine at all, I pass the touch tests, but while they never feel cold in themselves, they are often cold to the touch. I must remember to do my armchair circulation exercises to keep things moving!
Viv 8)