How long after Botox injections can side effects start?

Question

I receive Botox for migraine treatment. I had my second round about a month ago. Today, while I was sitting at work, all of a sudden it felt like someone punched me, and the area is slightly swollen. It is at a point where I had an injection (above my eyebrow). I get migraines, and it could just be something weird with that, but could it be something from the Botox after a month? And so randomly?

Martin Jugenburg, MD · Answer

This is unlikely related to botox especially now that it's a month post treatment.  You should follow up with your family doctor and be assessed.

Christopher J. Davidson, MD, FACS · Answer

Thank you for your questions.  Botox injections are unlikely to cause a feeling of being punched one-month after injection.  Best to follow up with your doctor.  Best of luck.

Jason Emer, MD · Answer

Botox results begin to take effect at 10-14 days and last for 3-4 months. I suggest you see an expert.  Best, Dr. Emer.

S. Larry Schlesinger, MD, FACS · Answer

Botox functions for 4 hours after injection.  It is then deactivated and removed from the body.  Very very unlikely that Botox has anything to do with your pain and swelling.  A reasonable guess would be that the needle itself caused a minimal scar band which snapped, and this localized irritation caused swelling. Obviously, this is a supposition on my part, but it is as good as any other. I recommend you call your injector and see what he or she recommends.  Thank you for this interesting question.

Monika Soni, MD · Answer

Thank you for your question. It is very unlikely this id related to your Botox treatment especially after 1 month. I recommend having a follow up with your injection for an evaluation. Best of Luck!

How long after Botox injections can side effects start?

Answers (8)