Ouch. You part your lips ever so slightly and you're suddenly reminded of the painful sore in the corner of your mouth. The irritating cracks are medically known as angular cheilitis, a common ...

Angular cheilitis can look like swollen or red patches at the corners of your mouth. It’s caused by a variety of things, including saliva buildup, bacterial infections, smoking, and vitamin B ...

Cheilitis is a group of inflammatory conditions that cause the skin of the lips to become red, dry, scaling, and itchy. There are many possible causes of cheilitis, including infections, allergies, ...