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

Yes, I agree with previous answers.  It does not look related to the Botox.  I would ask your doctor what was used to prep your face before the injection and make sure not to use that again.  Looks like an allergic reaction.

Small bumps after botox is fairly uncommon and can occur for the following reasons:-allergic reaction to the prep agent-rare reaction to type of saline used with injection with botox-extremely rare to proteins associated with botox injection-rare- patients who have paradoxical acne after botox

This doesn't appear to be from the Botox injections themselves, but rather, a reaction, probably, to the solution used to prep your face. It should clear up with time. Make sure to stick to a mild cleanser such as Cetaphil and stay away from any harsh skin care products like retinol until it clears up. Best of luck.

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