Lip pigmentation, also known as o B12, can cause dark lips Other habits: Lip licking and biting can irritate and damage the skin, and allergic reactions to toothpaste or lipstick can also cause darkening Other factors: Hormonal changes, certain medications, and underlying medical conditions such as melasma or Addison's disease can also contribute to lip pigmentation #best lip pigmentation treatment #best skin clinic #best clinic coimbatore #best laser clinic #near me #top clinic coimbatore #best laser clinic #best hydrafacial clinic #best mpt #best skin lightening #top 10 skin clinic coimbatore #best korean skin clinic #best hair removal