# Cracked Lip Corners: What Causes Them and How to Heal Them Fast
Cracked corners of the mouth, medically called angular cheilitis, result from a specific problem: saliva pooling in the corners of your lips. This moisture creates an ideal environment for bacteria to multiply and trigger inflammation.
Several behaviors cause this pooling. Drooling during sleep, smoking, and sleeping with your mouth open all contribute. The trapped saliva breaks down the delicate skin in those corners, leading to painful cracks that worsen with each smile or bite of food.
The healing process requires consistent moisture management. Dermatologists recommend applying an occlusive barrier after moisturizing. Products like Vaseline or Aquaphor seal in hydration and block bacteria from entering the wound. This two-step approach works because the underlying problem is dehydration combined with bacterial growth.
Hydration matters from the inside too. Drinking adequate water supports overall skin health and reduces the likelihood of saliva pooling in the first place. Using a humidifier, especially in dry climates or during winter months, helps maintain moisture levels in the air and on your skin.
Behavior changes accelerate healing. Avoid licking your lips, which temporarily moistens them but ultimately dries them out faster. Protect your lips from extreme temperatures and harsh wind. If you sleep with your mouth open, using a humidifier beside your bed helps.
Most cases resolve within one week with consistent care. However, contact a dermatologist if pain increases, swelling worsens, or improvements don't appear after several days. Persistent angular cheilitis can signal an underlying infection or deficiency that requires professional treatment.
The good news: this condition responds well to basic self-care. Focus on keeping the area clean, moisturized, and protected from saliva. Your lips will