I get a cluster of very itchy blisters on the side of my tailbone every few months.  They itch, rupture, clear liquid drains, the area looks like raw hamburger for a few days, then it scabs, falls off, leaving a dark area and then completely clearing up.  The whole cycle takes about a month.  Ive been having this problem for about 15 years after I got a shot on my rump.  The cluster started right where I got the shot on my right butt cheek and has slowly moved to the side of my tailbone.  The only thing that seems to cut down the cycle in half is dabbing it with vodka.  Strange, I know.  Can anyone tell me what this is?
Hello, Welcome to Chat Doctor, It appears that you got some irritation which caused the small blisters and then resultant burning and itching. I suggest you to kindly wash that part properly. It would be better if you can soak your part in warm water for around 15-20 minutes for two times daily. It will help you in reducing the intensity of itch. In my patients I suggest them to apply calamine lotion over the affected area and to take antihistamine tablet such as loratadine or cetirizine twice a day. If still the problem continues then can meet a dermatologist. Thank you.