A pilonidal cyst is a round sac of tissue that’s filled with air or fluid. This common type of cyst is located in the crease of the buttocks and is usually caused by a skin infection.
If they’re not treated, chronic pilonidal cysts can also lead to abscesses (swollen pockets of infection) and sinus cavities (empty spaces underneath the skin).
They may be recurrent. Usually surgery is an option.
These are one of the many pilonidal cyst, sinus that has been treated with homoeopathy.