In January I had an extremely bad reaction to Botox to my forehead and frown lines I have had Botox for about 4 years It started with welts , itching , swelling I did a Botox allergy test with both Botox and the mixture used to mix it with in my fore arm the dr did a " double blind "test noting happen I had no reaction to either injection ??? My question is so what actually happen in January with the reaction so confused