Lidocaine is a local anesthetic that is used to prevent and treat pain caused by some procedures, minor burns, scrapes, insect bites, and certain skin conditions. It works by blocking the signals at the nerve endings in the skin and mucous membranes, causing temporary numbness or loss of feeling. Lidocaine is available in various forms, including cream, ointment, jelly, viscous solution, and skin patch. Some forms of lidocaine are also used to decrease discomfort or pain during certain medical procedures/exams, such as sigmoidoscopy, cystoscopy, and tracheal intubation. Lidocaine should be used as directed by a healthcare professional, and patients should not exceed the recommended doses. Lidocaine should not be used long-term to decrease pain from poorly fitting dentures, and it should not be used to treat teething pain in infants and young children due to an increased risk of serious side effects. Patients should inform their doctor or pharmacist of any allergies or medical conditions before using lidocaine.