What does dermatitis mean?
Dermatitis is a medical noun referring to inflammation of the skin, characterised by redness, itching, swelling, and sometimes blistering or flaking. It functions as an umbrella term for several distinct conditions: contact dermatitis arises when the skin reacts to an irritating substance or allergen such as detergents, nickel, or certain plants, while atopic dermatitis — commonly known as eczema — is a chronic condition linked to genetics and immune function. The word derives from Greek roots: 'derma', meaning skin, combined with the suffix '-itis', denoting inflammation, the same ending found in arthritis and bronchitis. In register, dermatitis belongs to formal and clinical language; laypeople more often say rash or eczema. Because it names a group of common ailments rather than a single disease, the term appears frequently in health advice, product labelling such as hypoallergenic claims, and patient information leaflets. Knowing the word helps in understanding medical diagnoses and distinguishing allergic reactions from other skin complaints.
nounA medical condition in which the skin becomes inflamed, red, and itchy, typically caused by irritation or an allergic reaction. It is an umbrella term covering several related disorders such as atopic dermatitis and contact dermatitis.
- Inflammation of the skin, typically producing redness, itching, and sometimes blistering or scaling, caused by irritants or allergens (contact dermatitis).
- A chronic, relapsing inflammatory skin condition with a genetic or immune component, especially atopic dermatitis (commonly called eczema).
"The new detergent caused a stubborn case of contact dermatitis on her hands."
"Prolonged exposure to harsh cleaning chemicals left him with dermatitis on both hands."
"Children with atopic dermatitis often benefit from fragrance-free moisturisers applied daily."
The Greek-style plural is rare and used almost exclusively in specialist medical literature; 'forms of dermatitis' is preferred in ordinary English.
"The textbook surveys the various dermatitides encountered in clinical practice."
Dermatitis literally means 'inflammation of the skin' — borrowed straight from Greek, where 'derma' means skin and '-itis' means inflammation, the same ending you see in arthritis and bronchitis.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of dermatitis
Dermatitis comes from Greek: 'derma' (genitive 'dermatos'), meaning 'skin', joined to the suffix '-itis', which denotes inflammation. The compound was formed within scientific Latin and entered English during the early nineteenth century as medical terminology became systematised. It shares its Greek root with cognates such as epidermis, hypodermic, dermatology, and dermis, all of which preserve the ancient sense of 'skin'. The '-itis' suffix itself remains productive in medicine, appearing in terms like arthritis and tonsillitis.
Related word forms
How dermatitis is actually used
Dermatitis is a formal, clinical term used mainly in medical contexts; everyday speech usually prefers 'rash' or 'eczema'. It is an uncountable noun in general use, though doctors may speak of 'a dermatitis' when referring to a specific episode. The plural form 'dermatitides' exists but is rare and confined to specialist medical writing.
Easily confused with dermatitis
Eczema is often used loosely for the same itchy inflamed skin, but in strict medical usage eczema refers to the group of conditions (atopic dermatitis being one) while dermatitis is the broader term for any skin inflammation, including purely irritant or allergic causes.