Dry Lips: Causes and Doctor Approved Remedies You Can Use Vitamin B Deficiency: How It Affects Your Mouth and Causes Angular Cheilitis Your Perfect Smile Can Vitamin Deficiencies Cause Chapped Lips? Dry Lips Vitamin Deficiency: Nutrient Warnings Dr. Berg Lip balm won't fix this. Called Angular Cheilitis, these painful splits are often caused by fungus thriving when you're low on Iron or Vitamin B2. Eating B rich foods like eggs, spinach, or