Ductal tumor refers to breast ductal tumor. The hardness of touching inside after surgery may be caused by failure of surgery, or formation of hematoma or scarring. 1. Surgical failure: the areola area of patients with breast ductal tumor can be palpated with a lump of tough texture, if the surgical treatment does not completely remove the lesion, the surgical site may feel hard when touched after surgery. 2. hematoma: the hardness of breast ductal tumor after surgery may also be due to postoperative complications, which may be due to the rupture of blood vessels during surgery, and hematoma will be formed after the overflow of blood into the tissues. 3. Scarring: the cause of this disease has not been completely clarified, but research has shown that it may be related to inappropriate suturing, depth of skin lesion damage, skin tension and other factors, therefore, after breast ductal tumor surgery, local skin tissue trauma repair process produced scarring, may touch the surgical area feel hard to touch inside. It is recommended that patients with ductal breast tumors that feel hard to the touch should go to the hospital for a follow-up examination to determine the exact cause.