Angular cheilitis usually occurs only at the two corners of the mouth, also commonly referred to as "cracked corners of the mouth." The surface may show some whitish substances and appear moist. Patients might avoid opening their mouths wide, as doing so can cause significant pain due to the worsening of the sores at the corners. This may even prevent patients from eating normally. Angular cheilitis generally refers to various inflammatory conditions of the lips, such as cracking, bleeding, and peeling, which could be caused by changes in the weather. For example, during the dry seasons of autumn and winter, patients' lips are prone to these inflammatory symptoms, showing signs like cracking, bleeding, and peeling. It is advised that patients should not peel off the skin with their hands, as this can increase the risk of infective inflammation. Thus, angular cheilitis is different from cheilitis.