This article discusses identifying the symptoms of angular cheilitis. It notes that angular cheilitis is common and has a variety of causes. The main symptoms are skin discoloration, inflammation, cracked lips, pain at the corners of the mouth, and blistering. These symptoms can help identify angular cheilitis without medical expertise. However, doctors may perform culture tests to identify bacterial, viral or fungal infections that could be causing it. The article also discusses conditions that could be mistaken for angular cheilitis and how to tell them apart.