Other uses of Lidocaine/Prilocaine cream include numbing for circumcision, tattoos and for injection. It can also be used to treat rectal discomfort due to hemorrhoids. Lidocaine is given as an injection during circumcision to induce the dorsal penile nerve block to aid in pain management. Lidocaine cream helps temporarily numb the skin to prevent pain and involuntary movements the body feels during the process of getting tattooed. This is the same for injections.