The treatment method should be multi-point small hole drainage, and most of them can be cured well by dressing change and timely assisting some external drugs to promote growth. The key here is aseptic operation to prevent infection! This is very important, infection will leave scars and hinder function, remember!
The above two points are easy to say, but I'm afraid you need some professional knowledge and experience. If you can't master them completely, it's better to go to the hospital for surgery and find an experienced doctor.
I hope these suggestions are useful to you and get well soon.