Kank-A Mouth Pain Liquid is ideal for treating canker sores and other abrasions inside the mouth. Kank-A Liquid delivers maximum strength medication while forming a long-lasting barrier that protects .Kank-A combines the maximum allowable level of anesthetic for fast, temporary pain relief, with a film forming agent for long-lasting protection. Unlike most products which quickly wash away, Kank-A's coating holds the anesthetic in contact with the sore and acts as a barrier against further irritation. Kank-A liquid also includes an integrated applicator allowing for accurate, mess-free delivery of medication every time - no fingers, swabs, etc. required.