The medical specialty (or clinic/department) that diagnoses and treats diseases of the skin, hair, and nails; a dermatology department/clinic.
この病院の皮膚科は評判がいい。
The dermatology department at this hospital has a good reputation.
湿疹がひどくなったので皮膚科に行った。
My eczema got worse, so I went to the dermatologist.
子どものアトピーは皮膚科で治療しています。
My child's atopic dermatitis is being treated at the dermatology clinic.