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 ...

The road to realizing I had angular cheilitis was rough. At first I thought I just had a really bad case of chapped lips. It was winter, after all, and I’m not a die-hard lip-balm user. But no matter ...

Just like chapped lips, it's easy to associate the development of dry, crusty patches on the corners of our mouths with exposure to extreme cold and dryness. But it turns out that those flaky patches ...