Sebaceous cysts are a type of benign proliferation that forms in areas of the skin where sebaceous glands are particularly active, containing a tofu-dreg-like substance encased in a cyst. Without treatment, they may gradually increase in size and can become painful or even rupture, leading to bacterial infection. It is generally advisable to seek treatment upon detection of such a condition. One can visit the dermatology department of a standard hospital for a minor surgery to remove both the tofu-dreg-like substance and the cyst, which can be curative. It is also important to maintain a proper diet and lifestyle habits, avoid spicy and irritating foods, refrain from staying up late, bathe frequently, and exercise regularly to potentially prevent recurrence of the condition.