Breakout from Botox on my Forehead AFTER Two Weeks?

Botox injections wouldn't cause small pimples around the injection site two weeks post-treatment. It sounds like you're having a reaction to a topical treatment. Evaluate what is different or has changed and visit a dermatologist for further assessment.

I agree with the doctors below, an allergic reaction to Botox would not likely manifest two weeks after injection. It sounds like you may have begun touching rubbing, or itching that area since the treatment, which can transmit oil and germs from your fingertips, causing moderate acne breakouts. Try using a cleanser with salicylic acid and refrain from touching the area.

A picture would be helpful to give you the best advice.  Have you had Botox before to your forehead?  Did you have any problems after that treatment?  I will say that I have not heard of a problem similar to yours after a Botox treatment.  It's possible that they are milia.  I would recommend seeing your treating physician, as a examination would be needed to diagnose your condition.  

It is very peculiar that you would breakout with pimples after Botox. Its possible you have a minor infection, or were prone to breakout in the first place, hard to say without seeing. In any case, I'd definitely go in to see the dermatologist who treated you to quickly fix the problem. ~ Dr. Benjamin Barankin, Toronto Dermatology Centre.

A lot of people over exaggerate acne and allergic reactions, but it’s unlikely an allergic reaction if it has occurred that long after you’ve been injected.  If you are experiencing extreme pustules, wheals, itchiness, soreness please consult the physician that did your Botox.  Botox takes approximately 10 days to 2 weeks to fully kick-in.  I always see my first-time patients back for a 2 week follow-up to be sure they're happy with the results and do any touch-ups if they are needed.  My medical aestheticians actually notice fewer breakouts in patients with Botox across the forehead.  With the underlying wrinkle going through a transition you should also give your skin time to transition to the change.  In the meantime, contact the administering physician if your break outs don’t clear up. “Dr. D”