I suffered for 15 years and more with seborrhoeic dermatitis, red sore skin, and incredible itching.
Sometimes I felt as though my skin was crawling.
I then read about the demodex mite that can live in the hair follicles. There is a soap called demodex from the face doctor.
I also found that my itchy sore inflamed skin was due to a fungal infection....and when I used Nizoral cream it really helped. My skin is now clear, so sometimes your inflamed seborrhoeic dermatitis can be down to a fungal (yeast) infection.
Carole