Pilonidal sinus disease is a common condition, and treatment options and outcomes vary greatly. Chronic symptomatic pilonidal sinus disease (PSD) primarily affects young adults and causes work loss. In this study, three treatment methods will be performed: the minimally invasive pit-picking procedure, crystallized phenol application (CPT), and a combined method (minimally invasive pit-picking procedure and CPT). The aim of this study is to compare the effectiveness of these three methods, evaluate short- and long-term results, and determine treatment success, the incidence of postoperative complications, chronic pain levels, recurrence rates, and patient satisfaction. Additionally, the effects of these methods on hospital stay, wound healing time, and workforce loss will also be examined.