Medical boots can come in the form of cold or hot therapy boots or alternatively you could take a look at Magnetic boots.
The cooling boots can be cooled or frozen and work by compressing the cold air into the horse’s leg to reduce any swelling and ease any sprains or strains. The most popular makes of cold boots are Lemieux, JHL and WoofWear and they all have cold preservation properties as well as the secure close fitting which allows the compression of the cold air to take place.
Heat boots can be warmed to provide heat therapy which can relieve stress in the horse’s muscles and help to recover injuries and swelling. WoofWear makes a heated boot as well as hot and cold packs. The magnetic boots also control temperature as they stimulate the blood flow to reduce overheating, swelling and pain. The main brand for the magnetic boots is Veredus.