Is there a disease that makes your breasts grow fast?

Yes, there is a condition that can cause breasts to grow rapidly. It's called gigantomastia, and it's a rare condition that typically affects women during puberty or pregnancy. In gigantomastia, the breasts can grow to be excessively large, causing discomfort, pain, and other physical and psychological problems. If you think you may be experiencing gigantomastia, it's important to see a doctor for evaluation and treatment.