Sebaceous cysts are benign proliferations that form under the skin in areas where the sebaceous glands are particularly active. They contain a sac filled with a substance that resembles tofu dregs. The most common treatment is a minor surgery to completely remove the contents of the cyst. After recovery, it is important to maintain a proper diet and lifestyle, avoid spicy and irritating foods, refrain from drinking alcohol and eating hot peppers, try not to stay up late, and avoid soaking in public baths or swimming pools. This condition has a tendency to recur, but forming good life habits after recovery can greatly reduce the recurrence rate. Additionally, oral medications that reduce sebum secretion may be taken, and frequent bathing with sulfur soap can help reduce bacterial infections on the skin surface. (Specific medications should be taken under the guidance of a physician.)