Which condition is often treated using heat therapy?

Heat therapy is commonly used to treat muscle stiffness because it helps to increase blood flow to the area, promoting relaxation of the muscles and improving flexibility. The application of heat raises the temperature of the tissues, which can relieve discomfort and reduce muscle tension, making it easier for the animal to move and alleviating stiffness.

On the other hand, acute sprains are typically treated with ice or cold therapy initially to reduce swelling and inflammation, while open wounds require sterile treatment and protection rather than heat, as applying heat to an injured or compromised area could aggravate the condition. Fractures also necessitate a different approach, focusing on immobilization and stabilization rather than heat application, since heat could increase blood flow and swelling around the fracture site, potentially leading to complications. Therefore, muscle stiffness is the condition for which heat therapy is most agreeable and effective.