**Core Concept:** Varicose veins are dilated, tortuous veins that occur due to reflux in the deep veins. The most common complication of below-knee stripping (removal) of varicose veins is injury to the perforating veins.

**Why the Correct Answer is Right:** Below-knee stripping of varicose veins involves the removal of superficial veins (like great saphenous vein) causing collateral circulation to be established through perforating veins. Perforating veins are a crucial part of the venous return system and any injury to them may lead to insufficient return of blood causing venous insufficiency and edema.

**Why Each Wrong Option is Incorrect:**

A. Deep vein thrombosis (DVT): This is a complication of below-knee stripping, not the most common complication. DVT occurs when deep veins are involved, not perforating veins.
B. Phlebitis: This is an infection of the vein, not a complication of stripping. Phlebitis is caused by infection in a vein, not stripping surgery.
C. Deep vein thrombosis (DVT): As mentioned earlier, DVT is a complication of deep vein stripping, not perforating vein injury.
D. Infection: Infection can occur immediately or delayed post-surgery, but it is not the most common complication following below-knee stripping.

**Clinical Pearl:** Proper preoperative evaluation, appropriate patient selection, and meticulous surgical technique can minimize the risk of complications, including injury to perforating veins. Postoperative compression therapy is also essential to prevent complications like venous insufficiency and edema.