Atopic dermatitis tends to be concentrated in certain areas. New-borns get it on the head--on the cheeks and behind the ears. Later it goes to their backs and the skin on the outside of joints. When they are old enough to go to nursery school, it tends to spread to the skin on the inside of joints and may even cover the whole body with its itchy rashes.
至於異位性皮膚炎則有特定部位，新生兒好發部位在頭部、臉頰、耳後，年紀稍大時則在身體背部、四肢外側出現，幼稚園階段的兒童則在關節彎處、嚴重的甚至全身都有發紅、發癢等症狀。