Ouch. You part your lips ever so slightly and you're suddenly reminded of the painful sore in the corner of your mouth. The ...

Though not directly a symptom of nail deficiency, angular cheilitis often accompanies Vitamin B12 deficiency. This condition shows up as cracks or sores at the corners of the mouth and can affect ...

Lip inflammation and angular cheilitis (cracked mouth corners) have been linked to iron deficiencies. Evidence shows that lip peeling may also indicate an iron deficiency. Although not a vitamin ...