<human>: I've heard of a lot of people getting Botox injections. What are they and what is it used for?
<bot>: Botox is a toxin derived from the bacterium Clostridium botulinum. It’s used to treat a variety of medical conditions, including facial wrinkles. It works by blocking nerve signals that cause muscle contractions, which reduces the appearance of wrinkles. The most common side effect is temporary paralysis of the muscles that produce frown lines.