Fibroids can range from pea sized to the size of a grapefruit. Although most fibroids remain small, their growth can be unpredictable. Some grow slowly, while others may grow very quickly. Most of the time, however, fibroids aren't dangerous. They are not associated with an increased risk of uterine cancer and almost never develop into cancer.
Fibroids can require emergency treatment if they cause sudden, sharp pelvic pain.
But this is a rare occurrence. In general, fibroids cause no problems and seldom require treatment. Drug therapy and surgical procedures can be used to shrink or remove fibroids if they do cause discomfort or troublesome symptoms. If you have uterine fibroids, you may not know it. At least half of all women with fibroids have no symptoms.