What is pilonidal sinus? What are its symptoms and its complications? Is surgery is the only treatment?

A pilonidal sinus is a narrow depression in the skin within which loose bodily hair gets trapped along with skin debris. It is usually found in the back at the tail end of the spine. It is also known to rarely occur elsewhere. Infection sets in often in pilonidal sinuses and this may become a recurrent feature. In some individuals it may lead to abscess or in others the infection may track into the surrounding area. Surgery is the only definitive treatment for this problem and is best undertaken early when the lesion is small.
I am suffering from this problem and I have tried Allopathy (Surgery),Ayurveda (Ksharasuthra), Homeopathy and now I am planning for Naturopathy.