How harmful cystic nodules are depends on the size of cystic nodules and their different locations for an objective analysis. First, if the cystic nodules are small in size and located in superficial organs, they do not cause compression symptoms of important organs, blood vessels and joints. At this time, the nodules are less harmful to the human body and can be dynamically reviewed and considered for surgical removal if necessary. Second, if the cystic nodules are larger in size and located in the thyroid gland, armpit, popliteal fossa and other parts of the body, they may compress the trachea and esophagus and cause difficulty in breathing and swallowing. Compression of nerves and blood vessels may cause ischemia, hypoxia, and numbness in the limbs. In this case, cystic nodules are more harmful to the human body, and patients are advised to have surgery to remove them as soon as possible to avoid serious complications.