Am having a nightmare... FEVER BLISTERS! its as itchy as hell! , i need clarification on it please.

* Someone told me It means i have too much typhoid so i need to start taking drugs
* Another said i have too much malaria
* Another person said it shows my system is fighting against fever/malaria...


Please doctors in the house i need clarification on what fever blisters really mean and the next step to take.
Help a sister