One nipple creates this off white crust from last 1.5 years that comes and goes. started happening after i stopped my birth control. anything serious?

Nipple crust: Can you squeeze the affected breast in such a way to get the material to come out of your nipple? If you can, can you tell if it comes out of just 1-2 nipple openings (typically there are 8-10 openings)? Has it been getting worse? Is the affected nipple red or itchy? Any family history of breast cancer? It may not be serious, but I recommend getting checked out with the above questions in mind.