Seborrheic dermatitis, a type of skin condition that most often causes facial dryness and scalp itchiness affects about 6 million children and adults in the U.S. It can be tricky to recognize or diagnose seborrheic dermatitis because the skin reactions it triggers mimic those caused by similar conditions like psoriasis, other forms of eczema or even allergic reactions.
Like many other conditions caused by abnormal immune responses, patients tend to experience on-and-0ff intervals of seborrheic dermatitis symptoms. This means most have episodes of skin reactions suddenly flaring up and then periods when they go away. Patients with dermatitis have reported that outbreaks are triggered by factors like: