Pityriasis amiantaceahttps://en.wikipedia.org/wiki/Pityriasis_amiantacea
Pityriasis amiantacea is an eczematous condition of the scalp in which thick tenaciously adherent scale infiltrates. It does not result in scarring or alopecia in most circumstances.

Pityriasis amiantacea affects the scalp as shiny thick scales. The scales surround and bind down tufts of hair. The condition can be localised or covering over the entire scalp. Temporary alopecia and scarring alopecia may occur due to repeated removal of hairs attached to the scale. It is a rare disease.

Treatment ― OTC Drugs
*Keratolytic agents containing urea may help treat the thick scale.
#40% urea cream

*Use anti-dandruff shampoo daily.
#Ciclopirox shampoo
#Ketoconazole shampoo
#Fluocinolone shampoo
#Pyrithione zinc shampoo
#Selenium sulfide shampoo

*Apply topical OTC steroids only to the itchy areas of the scalp. Be aware that applying too much steroid to the scalp can cause folliculitis.
#Hydrocortisone cream