Whether grade 3 breast nodule 0.9*0.6 is serious or not depends on the condition, breast nodules are generally categorized into benign breast nodules and malignant nodules. For grade 3 breast nodules, go to the hospital for consultation and regular observation to avoid delays. 1. Benign breast nodules: most of the breast nodules are benign, and grade 3 0.9*0.6 is relatively small, usually not serious and do not need treatment, but still need to go to the hospital for regular review to prevent the transformation to malignant breast nodules, about 3-6 months for review once, with ultrasound X-ray and other imaging tests under the doctor’s advice. 2. Malignant breast nodule: although most of the breast nodules are benign, the possibility of malignant transformation cannot be ruled out. Although grade 3 0.9*0.6 is relatively small, it will be more serious if the pathologic examination shows that it is malignant. If the patient is diagnosed with malignant breast nodule, it is recommended to go to the hospital in time to confirm the diagnosis, standardize the treatment, and carry out surgical treatment, such as vacuum-assisted minimally invasive rotary mastectomy, etc., under the doctor’s advice. Therefore, if the patient presents with grade 3 0.9*0.6, it is recommended to go to the hospital in time and make use of ultrasound, X-ray and other camera examinations. Make a judgment on the nature of the breast and actively cooperate with the treatment so as not to delay the condition.