1. Material from the cyst may drain through the pilonidal sinus. 2. Excessive sweating can also contribute to the cause of a pilonidal cyst. 3. One proposed cause of pilonidal cysts is ingrown hair. 4. Plewig and Kligman added another element to their acne triad, pilonidal sinus. 5. In particular, a pilonidal cyst in the gluteal cleft can resemble a sacrococcygeal teratoma. 6. Some researchers have proposed that pilonidal cysts may be the result of a congenital pilonidal dimple. 7. Some researchers have proposed that pilonidal cysts may be the result of a congenital pilonidal dimple. 8. It is characterized by clusters of abscesses, epidermoid cysts, sebaceous cysts, pilonidal cysts. 9. A pilonidal cyst is usually painful, but with draining, the patient might not feel pain. 10. The presence of bacteria and low oxygen levels hamper wound healing and exacerbate a forming pilonidal cyst.