The detection rate of hepatic cysts in health checkups is 1% to 2%. There are congenital and acquired liver cysts. Congenital liver cysts are present at birth. Acquired liver cysts are absent at birth and appear as de novo cysts with age. Most liver cysts are small, only 1 to 2 centimeters in diameter, but individuals grow very large, up to 10 to 20 centimeters in diameter. Liver cysts can be single or multiple, and there is no certain pattern of growth sites. They can be superficial or deep within the hepatic parenchyma, and some are even close to large blood vessels. Generally, liver cysts do not rupture, bleed, become infected, or become malignant. Only a few patients may experience intracystic hemorrhage, resulting in bloody cystic fluid or blood clots, sometimes followed by infection. Due to the slow growth of liver cysts, their clinical manifestations vary depending on the location, size, number, compression of neighboring organs, and the presence or absence of complications. Most patients are asymptomatic and are found only during physical examination. Diagnosis mainly relies on imaging examination, and the detection rate of liver cysts by ultrasound can be up to 98%; CT examination is better than ultrasound in some aspects. Liver cysts do not usually require treatment after discovery. There is no need for patients with liver cysts to avoid eating or changing their living habits or working environment. It is recommended that an ultrasound be done every six months to a year.