What Causes Pus Bubbles On Toes And Sole Of Foot?

I have pus bubbles all over the toes of my right foot along with the sole of the foot and the top. It has also begun to spread to my fingers. I've gotten this almost once a year for the past 4 or 5 years. As unhealthy as it may seem, the most effective way of treatment has been popping the pus bubbles but this year there is too much. I'm 16 years old, i'm about 5'5'' and i weight just around 150 pounds. Thanks,
Jake