I got a dysport injection 3 weeks ago I developed bad side effects is it normal? Will it get better soon?

The dosage of Dysport you received should be plenty to effectively treat your forehead, if all 60 was used in the forehead.  The best thing to do is to follow up with your physician.  A number of factors could have contributed to the lack of effect, but dosage is not one of them....

Yes, many patients will try one treatment and see if they like one better than the other. Most patients will continue with the one that works the best for them. 

Having a haircut with scalp massage after Dysport injections to the forehead should not result in any negative consequences. Answers to the following questions will help:1) How long after your treatment was the scalp massage?2) Was the area where the Dysport was injected massaged as well?The...

I think that a full medical evaluation is in order.  I have never seen or heard of this constellation of symptoms in a patient.  Although there is a cause for these symptoms, the association with Dysport is highly unlikely.

However, if you have an actual allergy to Botulinum toxin, it will not really matter which brand you are exposed to.  If the rash is sufficiently bothersome, I would recommend discontinuing the injections.  One thing though, an actual allergy to botulinum toxin is unlike to last 4...