What is the primary cause of bilateral cheilosis?

Bilateral cheilosis, also known as angular cheilitis or angular stomatitis, is primarily characterized by inflammation and cracking at the corners of the mouth. The most common underlying cause is a deficiency in vitamin B, particularly riboflavin (B2) and niacin (B3). These vitamins play crucial roles in maintaining healthy skin and mucous membranes. A lack of sufficient levels can lead to symptoms such as chapped lips and irritations in the oral cavity, which manifest as cheilosis.

While other factors like fungal infections (often associated with Candida) can cause similar symptoms, they usually are not the primary cause. Similarly, while an allergic reaction to toothpaste and a short vertical dimension of the jaw can contribute to oral health issues, they are not the direct leading causes of bilateral cheilosis. Understanding the primary role of vitamin B in maintaining oral health emphasizes the importance of balanced nutrition in preventing these conditions.