Sebaceous cysts are a result of hyperactive sebum secretion from the sebaceous glands, which accumulates in the local skin causing benign proliferation. Inside there is a sac containing material that resembles tofu dregs. If the cyst is small and does not show signs of growth, it can be left untreated, but it requires long-term observation.

If the sebaceous cyst grows gradually larger or becomes painful, it is advisable to visit the dermatology department of a reputable hospital for a minor surgery to completely remove the sac and the tofu-dregs-like material inside. After recovery, it is important to follow a disciplined diet and lifestyle to prevent recurrence. One should avoid spicy and irritating foods, try not to stay up late, exercise regularly, and bathe frequently.