Thanks for writing to us.
You seem to be developing recurrent furuncles
in the area.
The area is prone to get bacterial infection due to trapped sweat, moisture which provides a climate apt for fungus ir bacteria to grow.
Firstly do not over clean the area with soap and water.
Do warm water compresses of the area and apply mupirocin
cream twice in a day.
If required take a course of oral antibiotics
as it will help in early healing of lesiond.
Once the lesions heal continue application of mupirocin cream in anal area for few weeks to prevent further recurrence.
Hope that helped.