https://www.mayoclinic.org/diseases-conditions/seborrheic-dermatitis/symptoms-causes/syc-20352710
Seborrheic dermatitis - Symptoms and causes - Mayo Clinic
Jul 19, 2024 ... It causes scaly patches, inflamed skin and stubborn dandruff. It usually affects oily areas of the body, such as the face, sides of the nose, ...