Could having (past and future) Botox injections bring on a shingles outbreak?

It has not been shown to have a link to cause or contribute to development of Shingles.  Botox is a protein and shingles is caused by a virus that is already in your body from Chicken Pox exposure during childhood.  

Thank you for your question and I am sorry to hear of your shingles outbreak.  Though I can understand your concern, shingles outbreaks tend to be unpredictable and future Botox treatments should not increase your risk.  Certainly discuss this with your injector to minimize risks and consider the use of prophylactic medication.  Hope this helps.