i get white dry patches on my labia just after i finish my periods. they do not itch or smell, the skin on top becomes dry. the condition has been going on for the third round now but it tends to vanish a few days before my periods. i used clobetasol cream the first time but didn 't help so i now apply coconut oil. what could this be?! could it be caused by pads i use during my periods? how do i get rid of this