There are big concepts and small concepts of ablation therapy. The big concept is the broad concept, such as playing alcohol into the cyst, which is also called ablation. Narrow ablation means using laser or using microwave or radiofrequency needle, heating the needle and doing thermal burning, which is ablation in the narrow sense. The needle used for ablation is not very thick, inserted into the electricity, then heat is produced, and then the nodule is slowly burned off, after a period of time, such as 3 months, 6 months, the body burned off part of the absorption. The nodules then achieve the purpose of treatment.