According to the Mayo Clinic, a bulky uterus, scientifically known as "adenomyosis," occurs when the tissue that typically lines the uterus grows instead into the muscular wall of the uterus. Adenomyosis most often occurs after having children.
WebMD lists adenomyosis as a common cause for menstrual cramps, abdominal pressure, bloating and heavy periods. While potentially discomforting and painful, bulky uterus is not considered to be life threatening.
Depending on symptoms, WebMD reports that treatment options for adenomyosis do not typically involve surgery or other invasive procedures. Over-the-counter, anti-inflammatory pain relievers, such as ibuprofen and naproxen sodium, are commonly recommended by doctors. Heating pads are an excellent secondary source of comfort in dealing with cramps.