It can be blocked with local anaesthesia for procedures on the chin, lower lip, and mucous membrane of the inner cheek.

[2] It divides into three branches beneath the depressor anguli oris muscle.

Two branches ascend to the skin and mucous membrane of the lower lip.

This can be used in surgery of the chin, the lower lip, and the buccal mucosa from midline to the second premolar.

[4] This article incorporates text in the public domain from page 897 of the 20th edition of Gray's Anatomy (1918)