I have been using Fixodent for 30 years and it's always worked great. Unfortunately my bottom gum/bone has deteriorated, so my teeth slip even with Fixodent. Recently I developed an allergy.. either it's my dentures or Fixodent. My lip swells and my chin goes numb. Have you ever heard of anyone being allergic to Fixodent? An allergy can appear out of the blue, but I don't know what I would do without my Fixodent??