After I have Botox I seem to get horn style lumps over both ends of my brows. Can more Botox be injected to stop this? (photo)

Thank you for your question and photograph.  This result is because the tail of your muscle is a bit more lateral.  Your injector will need to adjust placement and units for correction.   Best of luck.

The most plausible reason for the response you have experienced with Botox is that your Coorugator muscle extends more laterally than most.  An additional amount of Botox placed in the region may solve your problem. 

Thank you for your question.  It is possible that too much botox in your forehead is causing the skin and muscle to drop, resulting in what you pointed out in your photo.  In my experience, patients can have a low brow to begin with, and giving botox to the forehead can make the brow fall lower.  There are techniques to inject botox so that the brow is gently elevated in a natural way.  I would look for a doctor that is familiar with this approach.