What does cheilitis mean?
Cheilitis is the medical term for inflammation of the lips, a condition marked by redness, dryness, scaling, cracking, or swelling of the lip tissue. Its causes are varied: it may arise from irritants such as lipsticks or toothpaste, allergic reactions, habitual licking of the lips, sun exposure, bacterial or fungal infection, or deficiencies of nutrients like iron and B vitamins. Clinicians commonly distinguish specific forms — angular cheilitis affects the corners of the mouth, while actinic cheilitis results from chronic sun damage and is monitored for precancerous change. Because the lips lack the oil glands and protective outer layers of ordinary skin, they are unusually vulnerable to this kind of irritation. Though firmly technical in register, the word is worth knowing precisely because it names something nearly everyone experiences, giving patients a clear, searchable term to bring to a doctor.
nounInflammation of the lips, typically causing redness, dryness, cracking, or swelling of the lip tissue. It may result from irritants, allergens, sun exposure, infection, or nutritional deficiency.
- Inflammation of the lips, whether caused by irritants, allergy, sun damage, infection, or nutritional deficiency.
"Months of working outdoors without sunscreen left him with actinic cheilitis that required a dermatologist's attention."
"The patient presented with painful cracking at the corners of her mouth, a classic presentation of angular cheilitis."
"Dermatologists warn that persistent, scaly changes on the lower lip may signal actinic cheilitis and warrant evaluation."
Rarely used; the classical plural follows the Greek-style '-itis → -itides' pattern seen in words like arthritis. In practice, writers refer to 'types of cheilitis' or 'cases of cheilitis' rather than using the plural directly.
"The review surveyed the various cheilitides encountered in dermatological practice."
The 'cheil' in cheilitis comes straight from the ancient Greek word for lip — making it one of those rare medical terms whose spelling has barely moved in two thousand years.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of cheilitis
Cheilitis derives from the ancient Greek word 'cheilos', meaning lip, combined with the suffix '-itis', used in medicine to denote inflammation. The combining form 'cheilo-' appears in several other medical terms of Greek origin, including cheiloplasty (surgical repair of the lip) and cheiloscopy (the study of lip prints). The word entered modern medical Latin and then English usage alongside other classical '-itis' terms during the development of systematic medical terminology.
Related word forms
How cheilitis is actually used
A formal, clinical term used almost exclusively in medical and dermatological contexts; everyday speakers would simply say 'chapped' or 'inflamed lips'. It frequently appears modified by a descriptor indicating cause or location, as in angular, actinic, or contact cheilitis. The plural is rare since the condition is usually discussed in general terms.
Easily confused with cheilitis
Cheilosis refers specifically to the cracked, sore lips caused by riboflavin (vitamin B2) deficiency, whereas cheilitis is the broader term for lip inflammation from any cause.
Chelation is the chemical binding of metal ions by a chelating agent, entirely unrelated to the lips despite its similar spelling.