Three months post lip fillers I developed swelling and what looked like fever blisters. (cold sore culture was negative) Steroids helped temporarily but, swelling and blisters returned almost immediately after completing the pack. My question is if I am allergic to one brand would I be allergic to all and what would be a first step towards attempting another filler. (1.2 Versa was the brand used) This is my first experience with fillers.