Bump on my forehead 4 days after Botox, is this normal?

Thank you for your question. It is obviously hard to fully evaluate your bump without examining you or at least seeing a photo of your face. In general, there are usually bumps at the Botox injection sites for a few hours after the procedure. In 15 years of injecting Botox in many locations on the body, I have never seen a bump related to Botox develop out of the blue on day 4.  I would not massage it on your own, but rather I would have you contact your injector directly and have them see you in person to better evaluate the area. If the area is red, tender or warm to touch, I would make that contact ASAP. Best of luck!

It is difficult to answer this question without pictures. You could potentially have swelling and bruising at the injection sites. It is important that you follow up with your injector to do an in person exam and discuss your concerns or options. Best wishes.