A medical condition involving inflammation of the lips, which can be caused by infection, allergy, sun exposure, or irritation.
From Greek 'cheilos' (lip) plus '-itis' (inflammation). Following the standard medical naming pattern where '-itis' indicates an inflammatory condition of the part named in the root word.
Cheilitis can actually tell you a lot about someone's health—severe or persistent lip inflammation can signal nutritional deficiencies, autoimmune diseases, or oral infections.
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