Did you intend to write to me or mary244?
mkh9
This sounds like it might be athelets foot.
It it is pus it could be an infection. So, they don't look like water blisters? You shouldn't really be popping and leaving open skin especially on your feet. If it is pus it may be a infection possibly caused by Staphylococcus. Try cleaning your feet well, dry and add triple antibiotic ointment and cover will a bandaid. If they get any worse (hurt , get a fever or spread) see your doctor.