Local anesthetics are medications used to temporarily block sensation in a specific area of the body. They work by inhibiting nerve signals, preventing pain from being felt during medical procedures. Commonly used in dentistry and minor surgeries, local anesthetics can be administered through injections, topical applications, or nerve blocks. These anesthetics are generally safe and effective, with a quick onset of action. Examples include lidocaine, bupivacaine, and procaine. While side effects are rare, they can include allergic reactions or temporary numbness. Local anesthetics allow patients to undergo procedures with minimal discomfort while remaining awake and alert.