Women who have been treated for breast cancer may be at risk for lymphedema or arm swelling. Currently, there are no clear treatment guidelines for lymphedema. One treatment method used to treat lymphedema is the use of compression sleeves to encourage the flow of lymph fluid out of the arms and prevent arm swelling in the future. Another treatment method is more intensive and involves wearing compression sleeves as well as special compression bandages overnight. It is unclear whether the use of compression with both sleeves and bandaging is more effective in treating lymphedema than the use of compression sleeves alone. The purpose of this research study is to evaluate the effectiveness of the use of compression garments in preventing or slowing the progression of lymphedema in breast cancer patients.