Axillary cysts can be registered with general surgery or with dermatology. Common axillary cysts are usually sebaceous cysts formed by blockage of sweat glands or sebaceous glands, which may be sweat glands or epidermis-like cysts formed by injury to the axillary skin. Large or painful cysts require surgical removal, which can be performed under local anesthesia, taking care not to damage important nerves and blood vessels in the axillary triangle. The surgery requires complete debridement of the cyst wall and routine postoperative pathological examination, which can easily lead to recurrence of the cyst if there is a remnant of the cyst wall. If it is a cyst related to breast disease, the cyst may have a fluid component inside, when surgical excision should be done with caution, extraction can be done first and simple laboratory tests are done to clarify the nature after extraction of fluid.