After two young females died after applying topical lidocaine in preparation of a laser hair removal have died of a heart attacks recently.
The FDA recommends:
use a topical anesthetic that contains the lowest amount possible of medication that will relieve the pain;
apply the topical anesthetic sparingly and only to the area where pain exists or is expected to occur;
not apply the topical anesthetic to broken or irritated skin.
their doctor what side effects are possible and how to lower their
chance of having life-threatening side effects from anesthetic drugs.
aware that if wrapping or covering the skin with any type of material
or dressing is recommended or considered, this can increase the chance
of serious side effects, as can applying heat to the treated area while
the medication is still present.