Symptoms can be aggravated by environmental factors like allergies ... Seborrheic Dermatitis affects oil gland-rich areas, causing redness, scaling, and dandruff, with a prevalence of 1-5% in Asia.

Nevertheless, AD can sometimes have a different morphology (ie, a nummular, prurigo-like, or seborrheic dermatitis–like morphology) and can occur with normal levels of total and allergen ...