Substance building up in my nipples?

Okay. So I've never had this problem until a few months ago, but I've been having a creamy color substance that builds up in my nipples and has a weird smell. I'll clean it out and everything but it just builds back up after a few hours. Clould this be...

a sign of breast cancer or just something natural?

Thanks. =]

You should see a doctor straight away...nipple discharge it common for some women but if you say it has a wierd smell and keeps building up after a few hours it could be very serious

If you nipple discharge is stained with blood then it might need immediate attention.

Nipple discharge is rarely a a symptom of breast cancer. But do see a doctor, because it could be one of a number of things that do require medical treatment. Try not to worry -- it's the third most common breast complaint that women have. .