How long after Botox injections can side effects start?

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.

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.

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.

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.

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!

Botox usually takes 7-14 days for full effect. At this point 1 month after your injection, it is highly unlikely that Botox has anything to do with your symptoms. That being said, I do recommend you discuss the issue with your injector.

Generally Botox reaches its maximal effect 5- 10 days after injection. So it would be unlikely that it caused your symptoms.

Happily, the neurotoxin in Botox is deactivated and removed from your body in about 4 hours. Even so, the effects last for about 90 days.  It would be pretty unusual that a month after your injections you suddenly had symptoms at the injection site.  If your symptoms persist, I would recommend that you return to the physician who injected you to see if they have any suggestions or answers.  I would bet it's a completely unrelated issue, like allergies, or even an atypical migraine and not from the Botox injections.