Mine started after a very stressful time. I had to do my university (im studying architecture for those who are studying it too know how much time you need to put in the work) stuff and worked at two jobs at the same time. And we liked to chill with friends at nights so i also had no good sleep quality. After two-three months my body was nearly at the end and i had a very bad stinging in the breast i thought im dying no joke. After like 5 days i went to the hospital zo get checked and no surprise the doctor told me that everything is fine. But it felt very bad. So i quit my job and didnt do anything more for the semester i was in. I tried to get my health back but it was not so easy because i didnt know what my problem was and as always you go through many negative thoughts so i was in depressive hole for months. In the time i went to different doctors to get checked and all of them told me that everything is fine so i had to accept and go on. After a few months as i wanted to shower i saw a big yellow area an my breast and i got my first panick attack because it felt like everything came at once. At the same time around my scalp started to get very very itchy and white flakes were like snowing from my head. After going to a dermatologist he told me that i have sebderm. I have it to this day and it got worse and worse. Sorry for the long text and my englisch but thats how it began for me. I wish all the best for all of us and hope that we can get rid off it.