After receiving an injection, some people experience symptoms at the injection site on the skin. This reaction is a common adverse effect of vaccines, Botox injections, biologics, and chemotherapy.

Botox (onabotulinumtoxinA) is a prescription drug that’s used to treat a variety of medical conditions. Botox comes as a powder that’s mixed with liquid to form a solution, which is injected. Note: ...

Botox, while generally safe, carries a risk of neurological side effects, such as drooping eyelids, dizziness, and headache. More serious complications, including nerve damage, may occur in rare cases ...