Uterine fibroids generally grow slowly. In clinical practice, if there is a sudden increase in the size of uterine fibroids in a short period, it is recommended that the patient immediately seek medical attention at a local hospital to ascertain the cause. Commonly observed reasons for an increase in the size of uterine fibroids include: firstly, if the uterine fibroids are tending towards malignancy, they can increase in size rapidly. Additionally, during pregnancy, under the influence of high levels of hormones in the body, pregnant women may also experience a sudden increase in the size of uterine fibroids, accompanied by red degeneration.