The guttural pouches are large, air-filled structures within the horse's skull, in the throatlatch region. These pouches can develop bacterial infections, fungal infections, or tympany, the excessive accumulation of air. Most diseases of the guttural pouches are not life-threatening. However, fungal infections within the guttural pouches can damage large arteries, causing horses to bleed profusely from their nostrils. Horses experiencing a severe nosebleed require emergency medical attention as this condition can be fatal in some cases.

Progressive ethmoidal hematomas (PEHs) in horses are non-cancerous masses that develop from the ethmoidal labyrinth. This is a structure with a high concentration of blood vessels within the horse's nasal [...]

Immune-mediated myositis (IMM) is a muscle disorder in horses where the immune system mistakenly attacks its own muscle fibers, resulting in severe muscle atrophy. IMM is one of the two disorders classified under Myosin Heavy Chain Myopathy (MYHM) in horses. These diseases are associated with mutations in the myosin heavy chain 1 (MYH1) gene.

Habronematidosis or habronemosis, more commonly known as summer sores, is a parasitic skin infection that can occur in horses. As the name implies, summer sores usually occur during the summer months.

Sesamoiditis in horses refers to pain and injury around the sesamoid bones, pairs of small triangular bones found at the back of the fetlock. Inflammation in this area can cause pain and changes to the bony structure of the sesamoid bones, resulting in lameness. Sesamoiditis is most common in hunter/jumper horses, young racehorses, and barrel racing horses. Treatment typically involves a prolonged period of rest, anti-inflammatory medications, and a slow return to exercise.