Cheilitis is inflammation of the lips. It can be acute or chronic, affecting the colored part of the lip (the vermilion), the surrounding skin, or the corners of the mouth. The causes range from something as simple as a reaction to lip balm all the way to chronic sun damage, nutritional deficiencies, or underlying diseases. Because “cheilitis” is really an umbrella term, understanding which type you’re dealing with makes all the difference in how it’s treated and whether it’s likely to come back.
The Main Types of Cheilitis
There are several distinct forms, each with different triggers and behavior. The most common ones people encounter are angular cheilitis (cracking at the corners of the mouth), contact cheilitis (a reaction to something touching the lips), actinic cheilitis (from long-term sun exposure), and exfoliative cheilitis (persistent peeling and flaking). Less common forms include glandular cheilitis, which involves chronic inflammation of the small salivary glands in the lower lip, and granulomatous cheilitis, where one or both lips develop persistent, painless swelling.
Infections also cause cheilitis. Herpes simplex virus (mostly type 1) is the primary viral cause. Bacterial cheilitis typically involves staph or strep bacteria. Fungal cheilitis, usually from Candida yeast, shows up as red, swollen, painful lips, sometimes with cracking, and often accompanies angular cheilitis or thrush inside the mouth.
Angular Cheilitis: Cracks at the Corners
Angular cheilitis is the type most people recognize: red, cracked, sometimes crusty patches right at the corners of the mouth. It starts as dry, irritated skin and can progress into swollen, painful sores that bleed when you open your mouth wide. It’s often confused with cold sores, but the two look and behave differently. Cold sores typically start with tingling, then form small blisters that weep and scab. Angular cheilitis stays localized to the mouth corners and doesn’t blister.
The causes fall into a few categories. Saliva pooling at the corners of the mouth (common in people who drool during sleep, wear dentures, or have deep skin folds around the mouth) creates a moist environment where Candida yeast and bacteria thrive. Nutritional deficiencies play a larger role than most people realize. Up to 25% of angular cheilitis cases are linked to low iron or B vitamin levels. Deficiencies in B2 (riboflavin), B3, B6, folate, and B12 can all contribute, as can low zinc or iron. People with diabetes, HIV, Crohn’s disease, chronic pancreatitis, or pernicious anemia are also at higher risk.
If topical antifungal or antibiotic treatment doesn’t improve things within two to three weeks, blood work to check iron, ferritin, B vitamin levels, and blood sugar is a reasonable next step.
Contact Cheilitis: Reactions to Products
Contact cheilitis happens when something that touches your lips triggers irritation or an allergic reaction. The most common culprits are lip balms and lipsticks, so much so that the condition is sometimes called “lipstick cheilitis.” But the list of potential triggers is long: toothpaste, dental materials, foods (especially nuts, cinnamon, citrus, mango, and pineapple), nail polish (transferred by touching your lips), metals in cutlery or orthodontic appliances, and even wind instruments.
Among metals, nickel and cobalt are frequent offenders. People wearing braces, for example, can develop angular cheilitis from a nickel allergy. Dental materials containing mercury, chromium, or eugenol are also known triggers. The tricky part is that contact cheilitis can take hours or days to appear after exposure, making it hard to identify the cause without patch testing.
Actinic Cheilitis and Cancer Risk
Actinic cheilitis develops from years of cumulative sun exposure. It primarily affects the lower lip, which receives more direct UV radiation. The lip becomes persistently dry, scaly, and pale or blotchy, and the normally sharp border between the lip and surrounding skin starts to blur. It’s essentially a precancerous condition: abnormal skin cells develop on the lip surface in the same way sun-damaged skin elsewhere on the body develops precancerous spots.
The concern with actinic cheilitis is progression to squamous cell carcinoma. A decade-long retrospective study in southern Brazil tracked 224 patients and found that 12% developed lip cancer, with the time to transformation ranging from just 2 months to 20 years. That rate is high enough that actinic cheilitis is taken seriously and typically treated rather than simply monitored. Any lip sore, thickened patch, or non-healing ulcer on a sun-exposed lip warrants evaluation.
Exfoliative Cheilitis: Chronic Peeling
Exfoliative cheilitis is an uncommon, frustrating condition where the lips continuously produce thick, yellowish keratin scales that peel off, only to regrow. People with this condition often have difficulty eating, talking, and smiling comfortably. The peeling cycle can go on for months or years.
It’s notoriously hard to treat. Conventional approaches like keratolytic (exfoliating) lip balms, topical steroids, antifungal creams, and sunscreen help in some cases but fail in most. For stubborn cases, options include laser treatment, cryotherapy (freezing), and certain systemic medications. A newer approach using a CO2 laser in a “pinhole” technique has shown promise, clearing lesions without the scarring and severe discomfort of traditional laser treatment. One important note: if your lips are peeling, resist the urge to pick at or chew off the flaking skin. This creates cracks and sores that worsen symptoms and delay healing.
Granulomatous Cheilitis and Systemic Disease
Granulomatous cheilitis causes persistent, painless swelling of one or both lips. It’s caused by a specific type of inflammation (granulomas, which are small clusters of immune cells) forming in the lip tissue. On its own, it’s uncommon. But it matters because it can be connected to broader systemic conditions.
The most significant association is with Crohn’s disease. Granulomatous cheilitis is considered a rare form of what’s called metastatic Crohn’s disease, where the inflammation characteristic of Crohn’s shows up outside the gut. It can also be linked to sarcoidosis, tuberculosis, or a neurological condition called Melkersson-Rosenthal syndrome (which adds facial paralysis and a fissured tongue to the lip swelling). When bowel symptoms are absent, distinguishing between these conditions requires biopsy and careful workup.
Drug-Induced Cheilitis
Certain medications cause cheilitis as a side effect. The most well-known are systemic retinoids, particularly isotretinoin (used for severe acne). Dry, red, cracked lips affect nearly all patients taking these drugs. The lip dryness typically starts within the first few weeks of treatment and lasts for the duration of the course. Consistent use of a thick, bland lip balm helps manage symptoms while on these medications.
How Cheilitis Is Treated
Treatment depends entirely on the type. Angular cheilitis caused by infection is typically treated with topical antifungal or antibiotic creams. Contact cheilitis resolves once the offending allergen or irritant is identified and avoided. Actinic cheilitis may require procedures to remove the damaged tissue. For inflammatory forms like eczematous or atopic cheilitis, topical corticosteroids are the usual first step. When corticosteroids don’t work, or when erosions are severe, a calcineurin inhibitor ointment applied twice daily for about two weeks and then tapered can be effective, particularly on the thinner skin of the lips.
Preventing Recurrence
A few daily habits go a long way. Use a bland lip balm, meaning one without fragrances, flavors, menthol, camphor, cinnamon, or peppermint oil. Ingredients that soothe rather than irritate include petrolatum, ceramides, dimethicone, and shea butter. If a lip product causes any stinging or discomfort, stop using it.
For sun protection, look for a lip balm with SPF 30 or higher that uses physical blockers like titanium dioxide or zinc oxide rather than chemical sunscreens, which can themselves cause contact reactions. A wide-brimmed hat adds another layer of protection. In cold, dry weather, covering your lips with a scarf or similar barrier reduces chapping.
Stay hydrated, and if you tend to lick your lips when they feel dry, work on replacing that habit with applying balm instead. Saliva evaporates quickly and strips moisture from the lips, creating a cycle that worsens dryness and irritation. At the first sign of dryness or cracking, a protective layer of a simple, fragrance-free balm is your best defense.