Assertion: vein's valve | /r/HasProperty | damaged
Facets:
Source sentences:
text: If these valves are weak or damaged, blood can flow backward and pool in the vein, causing the veins to stretch or twist.
text: When venous valves are damaged, blood can flow in the wrong direction and lead to stretched-out, bulging veins, Gregory P. Kezele, the medical director of Vein Clinics of Cleveland, tells Mental Floss.
text: If the valves are weak or damaged, blood can back up and pool in your veins.
text: If the valves are weak or damaged, blood can back up and pool in your veins.