In case of superficial cysts in the extremities or trunk, usually an abnormal local protrusion can be seen in the appearance and a round swelling will be felt when massaging the local area, which has a clear border, is relatively soft in texture, and is elastic and movable when pressed, and has a high degree of mobility. However, if the cyst grows inside an internal organ, such as a liver cyst or a kidney cyst, the cyst is relatively small and does not affect liver function or kidney function, and usually does not show any symptoms. To determine whether a cyst is a cyst, the nature of the cyst can usually be basically identified by ultrasound.