What is this dark line on my lower lip? (Photo)

Thank you for your question and for providing a photo. A dark line on the lower lip can have several causes, and it’s important to consider these possibilities:

Hyperpigmentation: This is a common cause and can occur due to increased melanin production, often resulting from sun exposure or irritation.

Venous Lake: This is a small, dark blue to purple lesion caused by dilated blood vessels, often appearing on the lips.

Lip Licker’s Dermatitis: Frequent lip licking or irritation can sometimes lead to changes in pigmentation.

Mucosal Melanosis: This is a benign condition characterized by increased pigmentation on the mucosal surfaces, including the lips.

Other Causes: It could also be a result of trauma, certain medications, or other dermatological conditions.

For an accurate diagnosis, I recommend scheduling an appointment with a board-certified dermatologist. They can examine the area and determine the cause of the pigmentation. Depending on the diagnosis, treatment options may include topical lightening agents, laser therapy, or other interventions.

Best regards,