Yes lidocaine can be used topically, it can be in the form of gel or spray, lidocaine gel is commonly used in dental procedures or oral health related lessions, such as oral ulcers, herpes zoster, herpes simplex etc, application of lidocaine gel on oral mucosa has anaesthetic effect hence reduces the pain, thus it is commonly used in most of dental procedures involving kids before administering injection, as for lidocaine spray, it can also be used topically in many situation, e.g when there is an abscess before doing incision and drainage, on puncturing blood vessel etc