I notice that when running, sweat is sometimes highly irritant and causes my skin
to really burn. I would say my skin
has a tendency to dryness, with very mild eczema.
I think this is behind the root cause of my eyelid problem (rather than any blocking of oil secretion ducts around the eyelids as with blepharitis. I read the following web page which had some useful information about dry skin, particularly the issue about a lack of specific nutrients.