Re: Rash around nipple that won't go away
You have to be really specific if it is ON your actual nipple or just on your areola, around your nipple.
Some breast cancers can manifest as red patches although they are the rarest kind. Called Inflammatory Breast Cancer, they don't come with lumps or the usual symptoms, just a flushing that is unexplainable (ie: not from sunburn,etc) and doesn't clear up. This kind of cancer is very deadly and very QUICK to spread. You have had yours awhile, so I doubt this is what you have.
Crusty, red NIPPLES can come from a type of breast cancer called Paget's. Not to be confused with Paget's Disease, which manifests in bones. Dr Paget was a busy man, apparently. It is usually one-sided and only the nipple is involved in the reddish appearance. This is also somewhat rare.
Red rashes and itchy spots on the areola are more common and usually benign. We see it in alot of people with food allergies, sensitivities to laundry products and general acne problems. Sometimes caused by eczema.
You should show a doctor so you can be evaluated. It's probably nothing to worry about, but if it is something you need to understand waiting is not in your favor. Almost all breast cancers are survivable if handled early.