Many patients will have this kind of trouble, when the head down or sleep will occur one side or even both sides of the eyeball protrudes, rise feeling obvious, raise the head or the head high position then the eyeball protrudes will disappear, and even some patients will occur in the eyeball invagination. Why is this? Most of these patients have venous malformations of orbital blood vessels. Since the malformed blood vessels do not have venous valves, when the head is lowered or the affected eye is lowered during sleep, the malformed blood vessels are filled with blood and the reflux is impeded, the blood can not be refluxed in time, and it accumulates in the thick blood vessels, so the volume of orbital contents increases, which pushes the eyeballs to protrude outwardly, and the feeling of the eyeballs rising up is obvious. When the head is raised or the affected eye is elevated, the blood returns to the venous system due to gravity, the malformed blood vessels are not filled with blood, and the eyeball protrusion returns to normal. However, repeated blood filling will compress the intraorbital fat and lead to atrophy of the fat, so some patients will show obvious eyeball inversion when the head is elevated normally. This kind of patients due to the existence of this kind of abnormality, to a certain extent, affect the life, can take as little as possible to lower the head or head high position sleep and other measures, but the serious cases can significantly affect the life, and even some patients will occur malformation of blood vessel rupture, resulting in intraorbital hematoma, and even the compression of the optic nerve seriously affects the visual function. Therefore, it is necessary to actively consult the doctor for treatment.