Thanks for writing to H.C.M. for your query.
I have gone through your query regarding pus filled blister
in your ear canal
, and you wants to puncture it out.
I would like to tell you that you are most likely suffering from frunculosis of ear canal. Please DON'T PUNCTURE it otherwise there will develop severe swelling which will be of much painful.
You are advice to do these things-
(a) Antibiotic- Preferably broad spectrum.
(c) 10% Icthymol Glycerine should be put in ear after soaking in piece of gauge cotton.
This will help you.