Within minutes after showering, the back of my head, ears, and neck get very dry and icthy. What is going on?

After applying baby oil or vaseline, within a minute or so, a rough dry feeling occurs also on my arms, legs, and ocks.Marblelike nodules have come on the back of my head which sometimes bleed when I comb my hair. Nightly I tend toscratch the dry parts of my body. Vaseline and baby oil only help briefly. What possibly could be going onwith me? Even my eyebrows and eyelashes have become dry irritated. Sometimes I think gnats are flying in my eyes. I also have lesions around my lips and sideburns. Sometimes it feels as though something is flying in my nostrils. Often the soles of my feet get darker.