Assertion: varicose vein | /r/Causes | skin ulcers
Facets:
value: sometimes
type: TEMPORAL
Source sentences:
text: Sometimes varicose veins cause mild to moderate pain, blood clots, skin ulcers (sores), or other problems.
text: Endoscopic vein surgery usually is used only in severe cases when varicose veins are causing skin ulcers (sores).