Sebaceous cysts are benign proliferations that form due to the vigorous secretion of sebum by the sebaceous glands. They are generally located subcutaneously, not too deep, and consist of a sac filled with tofu-dreg-like material. This material forms from an initial abscess, whose clear pus gradually dries out. External and oral medications are generally ineffective for this condition, so it is advisable not to use topical medications. The most common treatment approach is to undergo minor surgery at a dermatology department in a reputable hospital to completely remove the sac and its contents. Subsequently, it is important to maintain a healthy diet and lifestyle, avoid spicy and irritating foods, and reduce staying up late to prevent recurrence of the condition.