topical anesthesia
Quick Summary
Topical anesthesia is a type of local anesthetic that causes a temporary loss of sensation in a specific area of the body by blocking nerve conduction. Unlike general anesthesia, it does not involve a loss of consciousness. Topical anesthetics are applied directly to mucous membranes, such as those in the nose, throat, or eye, or to the skin.12
This method is useful for minor procedures, like dental work or relieving a sore throat, and can be administered through lozenges, sprays, or creams. Common synthetic local anesthetics include procaine and lidocaine, with their names typically ending in "-caine". The effectiveness of topical anesthesia relies on the drug's ability to penetrate the nerve fibers and block the transmission of pain signals.12
Ask Britannica AI about this topic
Britannica doesn't have a full article on this topic, so we've curated a list of our relevant coverage.
- anestheticLocal anesthetics
This is called surface or topical anesthesia. A familiar example of topical anesthesia is the use of certain local anesthetics in throat lozenges to relieve the pain of a sore throat. Local anesthetics may be injected near a main nerve trunk in a limb to produce what is called regional…
Read MoreThis is called surface or topical anesthesia. A familiar example of topical anesthesia is the use of certain local anesthetics in throat lozenges to relieve the pain of a sore throat. Local anesthetics may be injected near a main nerve trunk in a limb to produce what is called regional…
Read More
therapeuticsLocal drug therapyTopical anesthetics, a type of local anesthetic, are also used on the skin, in the eye’s conjunctiva and cornea, and in the mucous membranes of the nose, mouth, larynx, vagina, or urethra.
Read MoreTopical anesthetics, a type of local anesthetic, are also used on the skin, in the eye’s conjunctiva and cornea, and in the mucous membranes of the nose, mouth, larynx, vagina, or urethra.
Read More