Uterine fibroids often develop red-like changes during pregnancy, and cystic lesions and hyaline changes may also occur. Pregnant women need to seek medical attention promptly, and doctors will treat them according to the specific situation and predict the risks during pregnancy. Common causes and treatment 1. red lesions of uterine fibroids: mostly related to degenerative degeneration in the blood vessels of the fibroid tissue, causing thrombosis and hemolysis, resulting in infiltration of hemoglobin into the fibroid tissue. During the attack, the abdominal pain is persistent and sometimes severe, accompanied by nausea, vomiting, fever and other symptoms, and the body temperature is usually around 38℃. In mild cases, conservative treatment is the main treatment, according to medical advice to be magnesium sulfate and other contraction inhibitors for fetal preservation treatment, if the symptoms continue to aggravate the need to promptly seek medical attention to take the necessary treatment; 2, cystic lesions of uterine fibroids: mostly manifested as uterine bleeding, pain, abdominal mass, increased leucorrhea and other symptoms. It is a benign lesion, and if it does not affect the fetal development, it is recommended to observe and treat it for the time being. 3. Transparent fibroids: Mostly due to insufficient blood supply to the fibroids, resulting in edema and vaporization, which are replaced by intercalated glass-like material. It is a benign lesion and can be treated with observation and regular review if the symptoms are mild. If more serious, surgery is needed; 4. Others: calcification is common in postmenopausal women and sarcoma-like changes into malignant changes, both of which are rare in pregnant women, but still need to be noted to avoid the presence of special conditions. Pregnant women who are found to have degenerative uterine fibroids must adjust their mindset, actively follow the doctor’s advice and cooperate with treatment to avoid anxiety and depression due to excessive psychological stress, which can affect their health and fetal development.