Hello car14
Itchy breasts can be a symptom of cancer. Inflammatory breast cancer (IBC) and Paget's disease of the breast are two forms of breast cancer that may include itching as a symptom.
However, itching can also be a symptom of dry skin, irritation, an allergy, and plenty of other problems that aren't dangerous. IBC usually presents with a combination of symptoms like swelling, redness, dimpling, pain, and/or itching.
Most people have several symptoms that develop quickly. Paget's usually has a scaly rash around the nipple. If the only symptom you have is itching, and if you have checked with the doctor, I don't think you need to get another opinion. If you do develop new symptoms, be assertive in getting your doctor to do some tests to find out exactly what is going on.