Breast ducts of 1.6 millimeters are not very serious, but patients should pay attention to their condition in time to avoid serious progression. The normal width of breast ducts is within 1 millimeter, if it is greater than 1 millimeter, such as 1.6 millimeters, it means that the widening of breast ducts may be caused by breast hyperplasia, mastitis and other reasons. If the patient has breast hyperplasia, the hormones in the body will promote the development of the breast ducts, resulting in ductal dilatation. Dilatation of breast ducts can be treated by medication and surgery. Patients can take antibiotics such as penicillin and cephalosporin to control inflammation, while surgery such as mastectomy and segmental mastectomy can be used for treatment. Taking medication and choosing surgery need to be treated by the doctor according to the patient’s condition. When the patient’s breast ducts are 1.6 millimeters wide, it is recommended to go to the hospital in time and be treated under the doctor’s consultation.