Sebaceous cysts generally have several causes. The first is that the sebaceous glands enlarge and grow in areas subject to pressure or friction, causing pain. Others involve long-existing sebaceous cysts that recently became infected with bacteria, leading to localized pain. In such cases, it is recommended to visit a dermatology department at a reputable hospital for minor surgery to completely remove the cyst sac and its cheese-like contents. It may also be appropriate to take some anti-inflammatory medication. During and after treatment, it is crucial to maintain a proper diet and lifestyle, as this condition is somewhat related to excessive sebum secretion. Therefore, it's important to avoid spicy and stimulating foods, try not to stay up late, engage in regular exercise, sweat more, and bathe frequently.