The old classification called cavernous hemangioma is composed of numerous blood sinuses of endothelial cells. The blood sinuses vary in size and shape, like sponge structures. The blood in the sinusoidal cavity coagulates into a thrombus and may calcify into a vein stone. They occur in the cheeks, neck, eyelids, lips, tongue, or floor of the mouth. The location varies in depth, with normal skin or mucosal color if deeper, and blue or purple if shallower. The borders are less clear, soft to the touch, compressible, and sometimes venous stones can be found. When the head is in a low position, the lesion area is engorged and swollen; when the normal position is restored, the swelling is also reduced and restored to its original state. This is called positive postural shift test. When the size of the venous malformation is not large, there are usually no conscious symptoms. If it continues to develop and grows, it may cause facial, lip and tongue deformities and functional disorders. If infection occurs, it may cause pain, swelling, surface skin or mucosal ulcers, and risk of bleeding.