Creates sometimes serve a purpose structure and identification of human body substances. Growth covered with a membrane called a cyst in this case. Cysts are commonly formed in organ tissue between the muscle and skin surface or empty space. Is generally the most cystic follicles harmless (benign) and filled, self-contained, air, infected fluid or semisolid material sebum. Cysts are unknown reasons during fetal development, infectious diseases and some to by defects occur. Many people under their arms and wrists a little, hard lump there. These lumps are actually called Sebaceous Cyst cyst form. Ganglion cysts are lumps of the wrist. Cysts develop in some people, the vocal cords. Cyst of the scalp and face to to discover the exceptional is not. Cysts are harmful or cancerous while may be very painful can be. The soldiers often spent sometimes reports during World War II Jeep, riding near the tailbones painful 'blister', time. Doctors soon cause real pain of ingrown hairs, and near the coccyx formation cystic follicles confirmation. Based on Greece words "hair-nest" condition is now known as pilonital cyst. Pilonital cyst development particularly susceptible is considerably under the hair behind the sedentary lifestyle that suffer from obesity. If not to spill naturally cyst is surgical intervention is required.