Hello, A pilonidal cyst is a cystic structure that develops along the tailbone (coccyx) near the cleft of the buttocks, approximately 4 cm-5 cm from the anus. These cysts usually contain hair and skin debris. Individuals with a pilonidal cyst may not have any symptoms at all (termed asymptomatic), whereas others may develop an infection of the cyst with associated pain and inflammation. Although some patients may experience a recurrence of pilonidal disease, in general, the long-term prognosis is excellent. In the rare case of squamous cell carcinoma development, the prognosis will vary according to different factors and should be discussed with your physician. Mortality (death) from pilonidal disease is extremely rare. There won t be any trouble and things will be fine with conservative management post surgery if already done. Also, it can not occur on the scalp maybe it will be something else. Need a general surgeon physical examination and assessment for the same. Hope I have answered your query. Let me know if I can assist you further. Regards, Jay Indravadan Patel, Physical Therapist or Physiotherapist