Cysts in newborns are very difficult to heal on their own, because most cysts in newborns are due to congenital developmental abnormalities, such as kidney cysts or lung cysts in newborns. Most cysts in newborns are benign and do not change significantly in size, although they are difficult to heal on their own and do not require special treatment. The newborn can be kept under observation after the development of the cyst, and the newborn should be closely monitored for any significant increase in size, especially over a short period of time. It is best to perform a biopsy of the cyst to determine the nature of the cyst. If the cyst is benign, it can be observed and waited for, but if it is obvious that it has increased in size for a short period of time, it can be surgically removed as soon as possible.