dermatitis

noun

der·​ma·​ti·​tis ˌdər-mə-ˈtī-təs How to pronounce dermatitis (audio)
plural dermatitides ˌdər-mə-ˈti-tə-ˌdēz How to pronounce dermatitis (audio) or dermatitises
: inflammation of the skin

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Dermatitis usually appears as a rash, and may cause itching, blisters, swelling, and often scabbing and scaling. It often marks an allergic reaction of some kind. Contact dermatitis is caused by something (often a chemical) touching the skin. Atopic dermatitis usually affects the insides of the elbows, the backs of the knees, and the face; generally resulting from an inherited sensitivity, it's often triggered by inhaling something. Eczema, psoriasis, and dandruff are all forms of dermatitis. Even in the worst cases, dermatitis isn't infectious and doesn't produce serious health consequences.

Examples of dermatitis in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
The North American Baseline Series — often used by dermatologists — is a standard list of allergens most commonly known to cause contact dermatitis, meaning skin irritation like redness or dry, cracked skin caused by direct contact with an allergen. Jacqueline Kilikita, Refinery29, 12 Dec. 2025 Your Allergy Symptoms May Improve Curcumin can help ease allergy symptoms in conditions such as asthma, dermatitis, and seasonal allergies (hay fever). Lauren O'Connor, Health, 21 Nov. 2025 Eczema is a catchall term for a number of chronic conditions (the most common being atopic dermatitis) that can make skin inflamed, discolored, dry, and itchy. Emily Kay Votruba, EverydayHealth.com, 13 Nov. 2025 Both have dealt with eczema, with Tori experiencing flare-ups while Stella deals with chronic eczema and seborrheic dermatitis. Angela Andaloro, PEOPLE, 4 Nov. 2025 See All Example Sentences for dermatitis

Word History

First Known Use

1876, in the meaning defined above

Time Traveler
The first known use of dermatitis was in 1876

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Cite this Entry

“Dermatitis.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/dermatitis. Accessed 19 Dec. 2025.

Kids Definition

dermatitis

noun
der·​ma·​ti·​tis ˌdər-mə-ˈtīt-əs How to pronounce dermatitis (audio)
plural dermatitides -ˈtit-ə-ˌdēz How to pronounce dermatitis (audio) or dermatitises
: inflammation of the skin

Medical Definition

dermatitis

noun
der·​ma·​ti·​tis ˌdər-mə-ˈtīt-əs How to pronounce dermatitis (audio)
plural dermatitises or dermatitides -ˈtit-ə-ˌdēz How to pronounce dermatitis (audio)
: inflammation of the skin

called also dermitis

dermatitic adjective

More from Merriam-Webster on dermatitis

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