Hi,
Noted your history of survivor cancer of ovary, undergone
Chemotherapy,
recurrent blisters on the top of buttocks, received Acyclovir oral and topical too.
The best diagnosis can be had by consulting your
Dermatologist,
The possibility of
recurrent boils due to pressure points or scabies too should be borne in mind.
Apply liquid
povidone iodine locally to avoid secondary infection.
If the pus or liquid is present then send it for lab.
Post the photos and detailed history as these help for on-the-spot diagnosis.
The blisters due to viral look different.
Get regular CBC done for White Cell counts.
Also get tests of any autoimmune or such diseases that give repeated viral infections.
Strengthen immunity.
Hope I have answered your query. Let me know if I can assist you further.
Regards,
Dr. T. Chandrakant, General Surgeon