Hi Bridgette 🙂
If your horse lives in a stall it surely explains it. Horses are made to move constantly so when they can't some horses are prone to stocking up. The best remedy is to allow it freedom in a paddock or pasture where it can be encouraged to move by placing water, feed, and shelter in different places. The more your horse moves, even at a walk, the better.
Bandaging and liniments may help in the short term but movement is the only thing that can really solve the problem 🙂