Welts after Botox? Is it an allergy?

Thanks for your question and as always, we recommend that you have these injections performed at the offices of a board certified dermatologist or plastic surgeon as we are the true experts in these injections and in injection techniques. Having small welts after a Botox injection is not uncommon – and it depends a lot on who did the injection, how fast or slow it was injected, and how gentle or rough the injections were.  They will go down as yours did and this should not have any long term effects or should it cause you not to continue with the proper injector in the future

Hi There 
Thank you for your question.
I think the red welts are due to the special saline we mix the botox with. Also I've noticed that it is worse when the mixture is really cold. 
Not allergy just irritation.
Kind Regards 
Dr Dinesh Maini