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Introduction
If you have noticed painful, red, or cracked skin at the corners of your mouth, you are not alone. Many adults experience this uncomfortable condition and turn to the internet looking for answers about what is causing it and how to find relief. Angular cheilitis — sometimes referred to simply as cracked mouth corners — is a surprisingly common oral health concern that can cause significant discomfort in daily life.
Angular cheilitis can affect people of all ages, though it tends to be more prevalent in certain groups, including older adults, those with nutritional deficiencies, or individuals who wear dentures. Despite being a common condition, it is frequently misunderstood, and many people delay seeking professional advice.
This article explains what angular cheilitis is, what may cause it, how it is typically managed, and when it is appropriate to seek professional dental or medical assessment. Understanding the condition clearly can help you make informed decisions about your oral health and overall wellbeing.
Featured Snippet: What Is Angular Cheilitis and How Is It Treated?
Angular cheilitis is a condition characterised by inflammation, soreness, and cracking at one or both corners of the mouth. Treatment of angular cheilitis depends on the underlying cause — which may include fungal infection, bacterial infection, nutritional deficiency, or ill-fitting dentures — and should ideally be guided by a dental or medical professional following a clinical assessment.
What Is Angular Cheilitis?
Angular cheilitis (also spelled angular cheilosis, or sometimes referred to as perleche) is an inflammatory condition that affects the corners of the mouth, known clinically as the oral commissures. The condition typically presents as redness, soreness, cracking, crusting, or ulceration at one or both corners of the mouth.
In mild cases, angular cheilitis may feel like a persistent dry or chapped patch at the corner of the lip. In more pronounced cases, it can cause visible splits or sores that bleed, weep, or crust over, making everyday activities such as eating, smiling, or speaking uncomfortable.
Angular cheilitis is not a single-cause condition. It is considered a multifactorial condition, meaning that several different underlying factors can individually or collectively contribute to its development. This is one reason why understanding the root cause is important before attempting treatment, as an approach that addresses one cause may not be effective if a different factor is driving the condition.
Although angular cheilitis is not typically considered a serious medical emergency, persistent or recurring episodes should be assessed by a qualified dental or healthcare professional to identify any contributing factors and discuss appropriate management.
What Causes Angular Cheilitis?
Understanding the causes of angular cheilitis is essential to selecting appropriate treatment. The condition can arise from a number of different contributing factors, and in many cases, more than one factor may be present simultaneously.
Fungal infection (Candida): One of the most commonly identified causes is an overgrowth of Candida albicans — a fungal organism naturally present in the mouth. When conditions favour fungal proliferation, such as persistent moisture at the mouth corners, this can trigger angular cheilitis. This is why the condition is sometimes associated with individuals who drool during sleep or whose mouth corners remain moist for extended periods.
Bacterial infection: In some cases, bacteria such as Staphylococcus aureus may contribute to angular cheilitis, either alongside a fungal infection or independently.
Nutritional deficiencies: Deficiencies in certain B vitamins (particularly B2, B3, B6, and B12), iron, or zinc are associated with the development of angular cheilitis. These deficiencies can affect the health of mucous membranes and skin integrity.
Ill-fitting dentures: In older adults or those with dentures, a reduction in the vertical dimension of the face (the distance between the nose and chin) can cause skin folds to form at the mouth corners, creating a warm and moist environment that encourages microbial growth.
Dry or chapped lips: Habitual lip licking, dry weather conditions, or dehydration can contribute to cracking at the mouth corners.
Underlying systemic conditions: In some individuals, angular cheilitis may be linked to underlying health conditions affecting immune function or nutritional absorption.
Recognising the Symptoms
Angular cheilitis presents with a relatively distinct set of symptoms, which can help individuals identify the condition — though professional assessment is always recommended for accurate diagnosis.
Common symptoms may include:
- Redness, soreness, or tenderness at one or both corners of the mouth
- Cracking, splitting, or fissuring of the skin at the oral commissures
- Crusting or scabbing that may reopen with movement of the mouth
- A burning or itching sensation at the affected site
- Swelling or mild inflammation of the surrounding skin
- In some cases, a whitish coating may be visible if a fungal element is present
Symptoms can range from mild discomfort to more persistent soreness that interferes with eating or speaking. The condition may appear to improve temporarily, only to recur — particularly if an underlying contributing factor has not been identified or addressed.
It is worth noting that several other conditions can produce similar-looking lesions around the mouth, which is one reason why a clinical assessment is valuable in confirming whether angular cheilitis is present and what may be driving it.
How Is Angular Cheilitis Treated?
Treatment for angular cheilitis is guided by the identified or suspected underlying cause. Because the condition can arise from different contributing factors, there is no universal one-size-fits-all approach, and treatment suitability should be discussed with a dental or medical professional.
Antifungal treatments: When a fungal cause is suspected or confirmed, antifungal creams or gels (such as those containing miconazole or nystatin) may be recommended. These are typically applied topically to the affected corners of the mouth for a prescribed period.
Antibacterial treatments: If a bacterial infection is contributing to the condition, appropriate antibacterial treatments may be suggested by a healthcare professional.
Nutritional supplementation: Where nutritional deficiencies are identified through blood testing, supplementation under the guidance of a GP or healthcare provider may help address an underlying contributory factor.
Denture assessment and adjustment: For individuals whose angular cheilitis may be linked to ill-fitting or worn dentures, having their dentures professionally assessed and adjusted or replaced may be an important part of managing the condition. A dental professional can evaluate whether denture fit is contributing to the problem.
Barrier creams and emollients: In milder cases, or as a supportive measure alongside other treatment, barrier creams may help protect the affected area from further moisture exposure.
Addressing underlying health conditions: If an underlying systemic factor is suspected, appropriate onward referral to a GP or medical specialist may be recommended.
The Dental Science Behind Angular Cheilitis
To understand why angular cheilitis develops, it helps to consider what happens to the oral tissues and surrounding skin when contributing factors are present.
The oral commissures — the junction points between the upper and lower lips at each corner of the mouth — are areas where skin meets the delicate mucous membrane lining of the mouth. This transition zone is relatively vulnerable to irritation and breakdown.
When the vertical dimension of the face is reduced — for example, due to tooth wear, tooth loss, or ill-fitting dentures — the corners of the mouth may begin to fold inward or downward. This creates small skin folds known as commissural folds, where moisture accumulates. Saliva, which contains digestive enzymes and is slightly acidic in some individuals, can continuously bathe these folds, softening the skin and creating conditions where fungi and bacteria can thrive.
From a nutritional perspective, B vitamins play an important role in maintaining the integrity of mucous membranes. A deficiency in these nutrients can weaken the body's natural barrier function, making the oral commissure tissues more susceptible to breakdown and infection.
Understanding these underlying mechanisms highlights why managing angular cheilitis effectively often requires addressing the root cause rather than simply treating the surface symptoms. A dental hygienist or dentist can play an important role in identifying oral health-related contributing factors and providing appropriate guidance. Structured routine continuing dental care can support earlier identification of recurring soft-tissue issues.
When Should You Seek Professional Dental Assessment?
While mild, short-lived angular cheilitis may sometimes resolve with simple self-care measures, there are a number of situations where seeking professional dental or medical assessment is appropriate.
Consider professional assessment if:
- Symptoms have persisted for more than two to three weeks without improvement
- The condition keeps recurring after appearing to resolve
- The cracking or soreness is significantly interfering with eating, speaking, or daily activities
- You notice spreading redness, swelling, or signs that may suggest infection
- You wear dentures and have noticed the fitting has changed or become uncomfortable
- You are concerned about a nutritional deficiency or have other associated symptoms such as fatigue, a sore tongue, or mouth ulcers
- You are immunocompromised or taking medications that may affect oral health
It is important to remember that a professional assessment allows a clinician to evaluate your individual situation, consider the range of possible contributing factors, and recommend the most appropriate course of action for your specific circumstances. An online article can provide educational information but cannot replace a clinical examination.
Watch: Understanding the Role of a Dental Hygienist in Preventative Oral Care
The following video explains the important role that a dental hygienist plays in supporting your oral health, including identifying concerns that may be contributing to conditions like angular cheilitis:
Angular Cheilitis and Denture Wearers
For individuals who wear dentures, angular cheilitis deserves particular attention. Denture-related angular cheilitis is a well-recognised pattern, especially in older adults, and understanding the connection can help prevent unnecessary suffering.
As dentures age or as the underlying bone and gum tissue changes over time, the fit of dentures can alter. When dentures no longer provide adequate support to the facial structures, the vertical dimension of the face can diminish, causing the corners of the mouth to drop or fold inward. This creates the warm, moist skin folds discussed earlier, providing an ideal environment for fungal organisms — particularly Candida — to colonise.
In addition, some individuals with poorly fitting dentures may also be affected by denture stomatitis, an inflammation of the tissue beneath the denture base, which can be associated with angular cheilitis.
If you wear dentures, this practical guide to oral care advice for denture patients can help reduce recurrence risk.
Regular dental reviews are particularly important for denture wearers to ensure that denture fit remains appropriate and that any oral tissue changes are monitored. If you wear dentures and are experiencing cracking at the corners of your mouth, arranging a professional assessment of your denture fit may be a helpful and important step. A dental professional can advise on whether your dentures require adjustment, relining, or replacement as part of your ongoing care.
Prevention and Oral Health Advice
While it is not always possible to prevent angular cheilitis entirely — particularly when underlying health or nutritional factors are involved — there are several practical steps that may help support the health of the oral commissures and reduce the risk of the condition developing or recurring.
Maintain good oral hygiene: Keeping the mouth clean and healthy supports the balance of the oral microbiome and reduces the risk of opportunistic infections. Regular tooth brushing, flossing or interdental cleaning, and professional dental hygiene appointments all contribute to good oral health. If dry mouth contributes to cracking, these tips for managing xerostomia in older adults are useful.
Stay well hydrated: Adequate hydration supports healthy mucous membrane function and helps prevent lip dryness.
Avoid habitual lip licking: Whilst it may feel soothing temporarily, repeatedly licking the lips or mouth corners can increase moisture accumulation and worsen skin breakdown at the commissures.
Watch for fungal recurrence in denture wearers: Recurrent commissure soreness can overlap with oral yeast problems; this explainer on managing oral thrush in denture wearers may help you spot when to seek review.
Eat a balanced diet: Ensuring your diet contains adequate B vitamins (found in wholegrains, eggs, dairy, meat, and leafy vegetables), iron (found in red meat, legumes, and fortified foods), and zinc can help support the health of the oral tissues.
Attend regular dental reviews: Routine dental and hygiene appointments allow a professional to monitor oral health, check denture fit where relevant, and identify any early signs of concern before they develop further.
Protect lips in cold or dry weather: Using an unflavoured lip balm or barrier product in cold or windy conditions may help prevent excessive lip dryness.
Seek advice if symptoms recur: If angular cheilitis keeps returning despite self-care efforts, this is a signal that an underlying contributing factor may need professional investigation.
Key Points to Remember
- Angular cheilitis is an inflammatory condition causing redness, soreness, and cracking at one or both corners of the mouth.
- The condition can be caused by several different factors, including fungal or bacterial infection, nutritional deficiencies, ill-fitting dentures, or persistent moisture at the mouth corners.
- Treatment should be guided by the identified underlying cause, and may include antifungal or antibacterial preparations, nutritional support, or dental assessment.
- Denture wearers are at particular risk and should have their denture fit reviewed regularly.
- Persistent, recurring, or worsening symptoms should always be assessed professionally rather than self-treated over an extended period.
- Maintaining good oral hygiene, a balanced diet, and attending regular dental hygiene appointments supports overall oral health and may help reduce risk.
Frequently Asked Questions
Is angular cheilitis contagious?
Angular cheilitis itself is not considered a contagious condition in the traditional sense. However, if the condition is being driven by a fungal organism such as Candida, it is worth being mindful of hygiene practices. Candida is a naturally occurring organism in most people's mouths, but factors that disrupt its balance — rather than transmission between individuals — tend to be the primary driver of angular cheilitis. If you are unsure about your symptoms or have concerns, a healthcare professional can provide appropriate guidance following assessment.
Can angular cheilitis go away on its own?
In some mild cases, angular cheilitis may improve without specific treatment, particularly if a temporary contributing factor — such as dry weather or slight dehydration — has been the primary cause. However, if the condition persists beyond two to three weeks, keeps recurring, or appears to be worsening, it is advisable to seek professional assessment. Recurring episodes often suggest an underlying factor that has not been addressed, and continued self-treatment without identifying the cause may delay appropriate management.
Can poor oral hygiene contribute to angular cheilitis?
Poor oral hygiene can contribute to imbalances in the oral microbiome, which may in turn increase susceptibility to fungal organisms such as Candida. Maintaining a thorough oral hygiene routine — including regular brushing, interdental cleaning, and professional hygiene appointments — supports overall oral health and reduces the environment in which opportunistic organisms may proliferate. A dental hygienist can offer personalised guidance on improving your oral hygiene routine as part of a preventative care approach.
Is angular cheilitis linked to vitamin deficiency?
There is a well-established association between certain nutritional deficiencies — particularly B vitamins (B2, B3, B6, and B12), iron, and zinc — and the development of angular cheilitis. If you experience recurrent episodes of the condition without an obvious explanation, it may be worth discussing the possibility of nutritional assessment with your GP. Blood tests can help identify whether a deficiency is present. Addressing identified deficiencies under professional guidance may form part of a longer-term management strategy.
Should I see a dentist or a doctor for angular cheilitis?
Both dental professionals and medical professionals can assess angular cheilitis, and the most appropriate first point of contact may depend on the suspected underlying cause. If you wear dentures, have concerns about your oral health, or notice other changes in your mouth, a dental professional is well placed to assess oral contributing factors. If you suspect a nutritional deficiency, systemic health issue, or recurring infection, your GP can conduct relevant investigations. In some cases, both dental and medical input may be beneficial.
Can children get angular cheilitis?
Yes, angular cheilitis can affect children, although it is less common than in adults. In children, contributing factors may include habitual lip licking, drooling, pacifier use, and nutritional deficiencies. If a child develops persistent soreness or cracking at the corners of the mouth, a dental or medical professional should be consulted to assess the cause and recommend appropriate management tailored to the child's individual circumstances.
Conclusion
Angular cheilitis — characterised by cracking, soreness, and inflammation at the corners of the mouth — is a condition that can significantly affect comfort and quality of life. Understanding the range of factors that may contribute to the condition, from fungal or bacterial involvement to nutritional deficiencies and dental considerations such as ill-fitting dentures, is an important step in seeking appropriate support.
For those experiencing angular cheilitis, the key message is that treatment is most effective when it is guided by an accurate understanding of the underlying cause. Self-care measures can provide some relief, but persistent or recurring symptoms warrant professional assessment.
Maintaining good oral hygiene, attending regular dental hygiene appointments, and eating a balanced diet all contribute to the health of the oral tissues and may help reduce the risk of angular cheilitis developing or returning. If you are concerned about symptoms at the corners of your mouth, book a clinical assessment for personalised advice.
Dental symptoms and treatment options should always be assessed individually during a clinical examination.
Disclaimer
This article is for general educational purposes only and does not constitute dental advice. Individual symptoms, diagnoses, and treatment options should always be assessed by a qualified dental professional during a clinical examination.
