Meniscus injuries can be treated conservatively in some cases and surgically in others. If the meniscus does not fit the scope of conservative treatment, surgery should be performed as soon as possible. For meniscus that requires surgical treatment, the principle of surgery should be: if sutures can be done, they should be sutured as much as possible, and if they cannot be sutured and a part of them needs to be removed, every millimeter of the meniscus should be preserved as much as possible. As far as possible, the meniscus should not be completely removed. The earlier the meniscus is operated on that requires surgical treatment, the better the hope of suturing and the less meniscus will be removed. There are usually no serious sequelae left after surgery (the knee ages much more slowly after meniscectomy than one might think or fear). It is highly unlikely that a meniscus that is not suitable for conservative treatment will heal without surgery.