Botox is a brand name for a purified form of botulinum toxin type A, a neurotoxic protein produced by the bacterium Clostridium botulinum. It is commonly used in both medical and cosmetic applications. In cosmetic procedures, Botox is injected into specific muscles to temporarily reduce the appearance of wrinkles and fine lines by blocking the nerve signals that cause muscle contractions. It can also be used to treat various medical conditions, including chronic migraines, excessive sweating, muscle spasms, and certain disorders of the nervous system. The effects of Botox typically last for several months before requiring re-treatment.