The contents are mainly sebum secreted by some sebaceous glands and some necrotic tissue and cystic fluid shed from the wall of sebaceous glands, which cannot be squeezed. Even if it is squeezed out, the cystic fluid or contents will be produced again later, so it is an indicator but not a cure, and there is no way to remove it completely. If you want to remove the powdery tumor completely, only surgical removal is possible. Therefore, for patients with powdery tumors, it is necessary to wait until the inflammation of the powdery tumor has subsided before performing surgery, and the integrity of the cyst wall should be maintained during surgical excision.