Purple Spot on Lip: What Causes It? | Colgate® Oral Care - Why do bottom lips turn dark
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If your lips turn blue and you're having trouble breathing or are getting dizzy, Certain medications can cause dark spots on your lips, such as This is a benign skin condition that involves the oral cavity, mainly the lower lip. Darkening of the lips can be the result of hyperpigmentation. This is a typically harmless condition caused by an excess of melanin.