Lidocaine 4% cream is a topical anesthetic used to relieve pain and discomfort from minor burns, abrasions, insect bites, and skin irritations. It works by numbing the skin through the inhibition of nerve signal transmission, providing temporary relief. Apply a thin layer to the affected area and rub it in gently. Avoid contact with eyes, nose, and mouth, and do not use on broken skin unless directed by a healthcare professional.