What causes Fibroids to flare up?

Fibroid symptoms vary in intensity and can be mild or severe, intermittent or constant. During menses, menstrual bleeding is often moderate to severe. Abdominal cramping associated with these periods may also be mild to severe. Abdominal bloating usually worsens leading up to menses and may improve the week after. Positions that place the weight of the Fibroids on the urinary bladder or rectum may worsen compressive symptoms such as urinary frequency or constipation, respectively. Acidic and pro-inflammatory foods may worsen subjective symptoms. Pain associated with Fibroids may occur or worsen during intercourse, exercise, bowel movements, or menstruation and may even radiate down the leg. An enlarged uterus from Fibroids can apply pressure to nearby organs, while pedunculated Fibroids may cause severe pain if their stalk twists.

Source: Fibroids.com