Other names: Pilonidal cyst, pilonidal abscess, Click to see full answer. In respect to this, what causes pilonidal cyst? Pilonidal cyst facts Pilonidal cysts are caused by groups of hairs and debris trapped in the pores of the skin in the upper cleft of the buttock, forming an abscess. Risk factors for pilonidal cysts include being male, sedentary, having thick body hair, family history, being overweight, and previous pilonidal cysts.Furthermore, are pilonidal cysts dangerous? While the cyst is not serious, it can become an infection and should therefore be treated. When a pilonidal cyst gets infected, it forms an abscess, eventually draining pus through a sinus. The abscess causes pain, a foul smell, and drainage. This condition is not serious. Likewise, can infection spread from a pilonidal cyst? When the condition is particularly severe, the infection can spread, creating multiple abscesses and sinus tracts (abnormal paths of tissue destruction). Small pilonidal cysts may not cause any symptoms if they do not become infected.What to do when you feel a pilonidal cyst coming on? To ease any pain, soak in a tub of warm water. Sometimes, your cyst may open and drain on its own this way. Take nonprescription pain medicine, but follow the dosing instructions. Keep the cyst and area around it clean and dry.