Lidocaine is a topically applied drug that is used to treat a variety of symptoms such as itchiness, irritation and soreness that are a result of skin conditions like eczema, burns, insect bites and scrapes. Patients suffering from hemorrhoids can find relief using lidocaine, as it helps ease the itchiness and discomfort associated with this condition. Lidocaine is a local anesthetic that numbs the area it is applied to.