Abstract: A breast pack for providing warm or cold therapy to the female breast is disclosed. The breast pack can be formed of a generally C-shaped or semicircular top layer and bottom layer, each having a central opening, which layers are joined along their perimeter edges to define a pocket therebetween which is filled with a thermal gel material. The breast pack, when heated or cooled, retains such heat or coolness for a long period of time. In use, the breast pack is formed into a conical shape by overlapping its ends and adjusted to the size and contour of the user's breast. The breast pack can be retained in position within the user's bra. A central opening in the C-shaped breast pack accommodates the nipple area of the user's breast.