Welcome to healthcareMagic forum,
It seems you have developed a contact allergic reaction
to the medicines used to clean the abscess
while draining...or else if you have water filled blisters on one side of the body then it could be herpes zoster
which mostly follows a painful episode.You need a proper consultation with the dermatologist
and a good coverage on antibiotics with anti allergic med.And if it is herpes zoster then an anti viral treatment and painkillers too.