I woke up this Monday with a dent in my forehead! I did have Botox about a month ago. I do also have a headache.

This is unlikely due to your Botox treatment. If it persists, I recommend following up with your Doctor. Botox results resolve in 3-4 months. Best, Dr. Emer

Thank you for providing the picture as a reference. Botox that was administered one month prior should not have caused a headache and dent in your forehead. You need to see your physician and find out the cause. Hope that helps and good luck. 

Simple answer is NO.  While you can have some tenderness for about 24 hours following treatment with BOTOX, there is no way that pain or a dent at this point is related.  I would keep on eye on this and see your primary care doctor if it worsens.Hope that helps!Warmest regards,-Gregory A Buford MD FACSBoard Certified Plastic Surgeon and Author