Fibroids are the tumours of the uterus. Fibroids grow because there is excess Estrogen in your body. Since Estrogen feeds the fibroids, they grow bigger and bigger as long as Estrogen dominance is there in your body. While some woman have no symptoms others have painful and heavy periods.
Uterine fibroids occur in 20-40% of all women during reproductive years. Fibroids are the number one reason for hysterectomy in the US.