NCIthesaurus has symptom dermatitis seborrheic dermatitis UMLS_CUI:C0036508 disease_ontology ICD10CM:L21 DOID:8740 DOID:8741 MESH:D012628 SNOMEDCT_US_2025_09_01:156328004 ICD9CM:690.1 NCI:C111888 A dermatitis that is an inflammatory skin condition resulting in flaky, white to yellowish scales on oily areas such as the scalp or inside the ear, which is caused due to a combination of an over production of skin oil and irritation from a yeast Malassezia furfur. The symptoms include itching, skin lesions and scales, redness, plaques and hair loss. SKIN SEBORRHEIC Seborrhoeic dermatitis Seborrhoeic eczema seborrhea skin lesion itching hair loss skin desquamation