The main advantage of applying compression post sclerotherapy is that it helps minimises the size of the sclerothrombus and soft thrombus formation.

Keeping thrombus to a minimum lowers the likelihood of pigmentation and thrombophlebitis after treatment.

Compression will also increase the flow through the deep venous system and thus help blood flow in legs which have compromised venous return.

Compression is usually applied using an elastic stocking, limited stretch bandage or both.