# Cracked Lip Corners: What Causes Them and How to Heal Them Fast
Cracked corners of the mouth, medically called angular cheilitis, develop when saliva pools in that vulnerable spot. Drooling during sleep, smoking, or keeping your mouth open habitually creates the perfect environment for bacteria to multiply and trigger inflammation.
The condition causes real discomfort. Smiling, eating, or even speaking can irritate the raw skin. The good news: most cases heal within a week with consistent care.
Your first step is creating a moisture barrier. After washing your face, apply a heavy occlusive like Vaseline or Aquaphor directly to the cracked corners. These products seal in hydration and keep bacteria out. Reapply after eating or drinking.
Hydration matters from the inside too. Drink plenty of water throughout the day. If your home air is dry, running a humidifier helps prevent moisture loss from your lips. Winter heating and air conditioning both create dry environments that slow healing.
Avoid behaviors that worsen the condition. Don't lick your lips, as this creates the exact moist environment bacteria love. Protect your mouth from extreme cold or wind, which can crack skin further. If you smoke, this is another reason to quit. Smoking damages skin barrier function and promotes bacterial growth.
Watch for signs that warrant professional help. If the cracks become increasingly painful, swelling spreads beyond the corners, or the condition doesn't improve after several days of home care, see a dermatologist. Persistent angular cheilitis sometimes indicates a fungal infection or nutritional deficiency requiring targeted treatment.
Some people find their lip corners crack repeatedly. This often points to an underlying issue like a vitamin B12 deficiency, iron deficiency, or candida infection. A dermatologist can test for these conditions