Botox is a form of toxin produced by the bacteria Clostridium botulinum. The botulinum toxin in food or wounds blocks the signal transmission between nerves and muscles resulting in botulism, or ...

Medically reviewed by Maria M. LoTempio, MD Key Takeaways Botox can cause temporary redness, swelling, tenderness, or bruising at the injection site.You may get flu-like symptoms like fever, body ...