A blister is a very irritating development in your skin. It usually occurs due to friction or rubbing a particular part of your skin. What happens here is the production of a small goblet of fluid on the upper surface of your skin. Blisters are a common story after surgeries' in many a cases. This is majorly caused after surgeries when they are not conducted with proper hygienic support. Your skin is not very healthy after an operation and thus in the case of any allergic reaction there is quite a problem with your skin. Just keep your surgeries away from any sort of friction and you will remain miles away from blisters.