Punctate calcification of breast nodules may be caused by benign breast nodules, breast cancer, breast trauma and other reasons. 1. Benign breast nodules: During the long-term growth of benign breast nodules, a large amount of calcium salts are deposited in the nodules to form calcified foci, and punctate calcification of breast nodules can be found during ultrasonography or X-ray examination. 2. Breast cancer: malignant breast nodules have more calcification foci than benign nodules. Malignant breast tumors often have point clusters and sandy calcification foci, and the surrounding area may contain abundant blood flow signals. 3. Breast trauma: After the breast is damaged by trauma, the damaged local breast tissue is not completely repaired, which leads to calcium salt deposition after a long time, and calcified foci will also be formed locally. Patients with nodular calcification of breast nodules should go to the hospital in time to improve the examination and give targeted treatment after clarifying the cause of the disease.