What is the Tear Trough Filler Restylane Tear trough filler Restylane is one of the most popular fillers used for this purpose, because it is made specifically to increase volume to the tear trough area. In addition, Restylane is made from hyaluronic acid, a substance that occurs naturally in the body. Read more: https://www.debwan.com/blogs/461886/Tear-Trough-Filler-Treatment-What-to-Expect