Aspercreme Lidocaine Patch is an adhesive pad designed to desensitize aggravated nerves and numb pain. The 4% lidocaine ointment is contained within a breathable pad, making it less messy than traditional creams. The flexible fabric backing makes it ideal for use on the back, neck, legs, and arms. This pain patch is odor free and will not burn or irritate the skin. It measures 3 15/16" x 5 1/2".