Hard lumps after axillary lymphatic drainage may be the result of keloids or inflammatory granulation tissue formed after surgery. 1. Keloid: If the patient belongs to the keloid type, after the axillary lymphatic cleansing surgery, keloid may be formed in the axilla, which is manifested as a hard lump in the axilla. With the passage of time, this keloid can usually absorb itself and gradually become smaller or disappear. 2. Inflammatory granulation tissue: If fat liquefaction or infection occurs at the surgical incision after axillary lymphatic drainage, inflammatory granulation tissue may appear after healing, and there will be hard lumps in the axilla. Generally, after treatment, as the inflammation disappears, the inflammatory granulation tissue will gradually become smaller and subside. If there are hard lumps after axillary lymphatic clearance, it is recommended to go to a regular hospital for review, to be examined by a professional doctor to clarify the cause and to be treated reasonably according to medical advice.