Why can mouth ulcers cause dry, cracked lips?

The causes of chapped lips due to oral ulcers include the following points: 1. Nutritional deficiencies: Both oral ulcers and chapped lips can be related to nutritional deficiencies, particularly insufficient levels of vitamin B2, vitamin C, zinc, and iron. These deficiencies may lead to abnormal metabolism of the oral mucosa, resulting in oral ulcers and potentially causing chapped lips. 2. Infectious factors: Oral ulcers and chapped lips can sometimes be caused by bacterial or viral infections, such as herpangina or ulcerative stomatitis. These infections not only affect the oral mucosa but may also involve the lips, leading to dryness and cracking. 3. Lifestyle habits: Unhealthy habits such as frequently licking the lips and insufficient water intake can exacerbate lip dryness. When coexisting with oral ulcers, these factors may worsen the symptoms of chapped lips. 4. Psychological factors: High levels of psychological stress and emotional fluctuations may also affect immune function, increasing the risk of oral ulcers and chapped lips. If you have concerns, please consult a relevant healthcare professional.