What does it mean to have valve damage in the vein of calf? previous dvt and has apls.

Venous insufficiency: Likely you have venous insufficiency which may or may not be secondary to your precious dvt. If the insufficiency is superficial (a varicose vein or one of the saphenous veins) this can be treated with endovenous ablation or sclerotherapy. If it is deep, there are fewer procedure options. Either way, compression therapy and a good phlebologist (vein dr) are your friend. Phlebology.Org.

Varies: Some congenital absence, some local vein valve injury by clot, some multiple valves damaged and lead to venous back flow called venous insufficiency, and venous hypertension and post phlebitic syndrome with swelling, ulcers etc. If limited to a calf vein may be relatively harmless unless recurrence. Find the cause: trauma, surgery, hypercoagulability etc.

Damaged Valves: Damage to valves in veins usually refers to the valve no longer functioning appropriately. The valves open and close and allow blood to go against gravity. When the valve is "damaged" It no longer closes all the way and blood can go the opposite way under gravity. This is called venous insufficiency. May or may not cause symptoms.