Pilonidal Sinus is most frequently encountered in the coccyx region. It is more seen in males under 40 years of age and often in such occupational groups as drivers, soldiers and students. It generally occurs in the case of heavy density of hairs and with such factors as local micro traumas. In the case of those persons who, as a necessity of their occupations, are seated for a long time, the coccyx region is constantly left airless and moist and ingrowing of hair can start due to a micro trauma. A hair makes a place for itself by forming an abscess wall under the skin. As a result, sachets filled with pilonidal sinus are created.