Excessive amniotic fluid refers to the amount of amniotic fluid exceeding 2,000 milliliters during pregnancy, which may be related to fetal structural abnormalities, pregnancy complications and other factors, and can be classified into acute amniotic fluid and chronic amniotic fluid according to the urgency of the onset of the disease. Hyperhydramnios occurs in the late stages of pregnancy, when the fetus has malformations such as esophageal and duodenal atresia, and because the fetus is unable to swallow the amniotic fluid, it can lead to the accumulation of amniotic fluid, which in turn leads to the occurrence of hyperhydramnios. Fetuses with neural tube defects, such as anencephaly and spina bifida, can also lead to amniotic fluid overload due to exposure of the cerebrospinal membrane and increased exudate. Patients with gestational diabetes mellitus can also develop amniotic fluid overload due to elevated maternal blood glucose, which can lead to elevated blood glucose in the fetus, which in turn produces hypertonic diuresis. Acute amniotic fluid overload can produce a series of compression symptoms, and patients may experience back pain, abdominal distension, dyspnea and other symptoms. Chronic amniotic fluid overload has mild symptoms, and pregnant women can mostly adapt to it, and may slightly experience symptoms such as chest tightness and shortness of breath. Excessive amniotic fluid can lead to premature rupture of membranes, preterm labor, placental abruption and other complications. If diagnosed with excessive amniotic fluid, the patient should go to the hospital in time and receive standardized treatment under the guidance of the doctor.