Operating costs averaged $22650 ($65/day) per inmate in fiscal year 2001 according to this report. It has much more info, tables by state and comparisons to amounts spent on health care, etc. Cost of incarcerating a US prisoner in secure custody in.
Insects can take the blame for some itchy blisters. Scabies are tiny mites that drill into your skin, sometimes leaving curved lines of blisters in their tracks. They often attack the hands, feet, wrists, and under the arms. Flea and bedbug bites can cause little blisters, too. The brown recluse spider has an extra-nasty bite that blisters before bursting to form a painful open sore. If that describes your blister, go to the doctor right away.
If the blister is on your hand, wear gloves to protect it if you use your hands to wash dishes, do laundry or perform another task that might cause the blister to break. Don't repeat the task that caused you to get the blister to begin with.