Lidocaine patch, also known as Lidopatch is a topical medication used to relieve pain. It is typically applied to the skin over the area of pain. The active ingredient in the lidocaine patch is lidocaine, which numbs the application area. A lidocaine patch is typically used for short-term pain relief and is not intended for long-term use.The patches are medicated adhesive pads placed on the skin to relieve pain. They are typically used to ease shingles, arthritis, and nerve pain. Lidocaine patches work by numbing the skin area to that they are applied. It works by numbing the place where it is applied.