I have what my kids call "tiger belly" which are the wide and silvery stretch marks that have never faded; they just got added to with each pregnancy.
I also have really rough knees. Not as bad as you see in EDS photos but still weird. Apart from flushing I also get random blotchy bright red rases on my legs and chest. Is this a possible EDS sign? It comes and goes but it does seem very odd.
Raymond Perrin (osteopath who created the 'Perrin Technique' for ME/CFS) uses the presence of stretch marks as part of his diagnosis of ME - he is in talks with the NHS as we speak working on using his diagnostic approach to identifying the disorder.
Rough knees and blotchy patches - sounds familiar to me too.