1 week after Botox, great results but my forehead is now covered in red bumps. (Photo)

Thank you for your question. This definitely appears to be a reaction from the prep solution prior to your Botox treatment because of the pattern of the red bumps. This should clear up in a few days. Use mild clearnser and moisturizer like Cetaphil and follow up with your doctor if it doesn't improve. Best of luck, Dr. Heffernan

The pattern of the redness does not look to be at the Botox injection sites.  Like others have said it could be the prep.  You could use an over the counter hydrocortisone cream lightly on the area.  Certainly if not clearing soon see your provider.
Dr ODell