When I Was Pregnant I Developed Folliculitis In My Last

When I was pregnant I developed folliculitis in my last trimester. I was told that my menstrual cycle could and it did trigger it..... It usually starts during my premenstrual time. My menstrual cycle has been on and off for about 3 weeks now... The itching occurs mostly at night. It usually looks like a stream of open follicles threaded by scratches.... (.....) Like what I placed in the parentheses....Some openings stand alone....what's wrong with me....the irritation feels almost like when I was pregnant......is it hormonal? Is it stress related?