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When a cat's stomach contents (i.e., food) move backwards, up into the esophageal track and into the mouth, this is referred to as regurgitation. This medical condition can be congenital or it can be acquired from a variety of causes. Fortunately, modifications to your cat's diet, in conjunction with medication, will correct the condition in most cases.

Regurgitation can occur in both dogs and cats. If you would like to learn how this medical disorder affects dogs, please visit this page in the PetMD health library.

Symptoms

Common symptoms associated with regurgitation include:

• Fever
• Lethargy
• Vomiting
• Coughing
• Weight loss
• Runny nose
• Difficulty swallowing
• Bad breath (halitosis)
• A ravenous appetite
• Swelling in the neck
• Increased breathing noises

Causes

Regurgitation can occur in any breed, although Siamese cats and Siamese-related cats are predisposed to the condition. Also, regurgitation occurs more commonly in dogs than in cats.

There are several medical problems that can cause regurgitation, including:

• Problems with the throat, often present at birth
• Congenital problems with the espophageal tract
• Acquired problems with the throat that can involve cancer, foreign bodies present, rabies, poisoning, and muscle disease (myopathy)
• Acquired esophageal disease that can develop from an enlarged esophagus, tumor, cancer, hiatal hernia, narrowing of the esophagus, and problems with the automatic nervous system

Diagnosis

First, your veterinarian will determine whether vomiting alone caused the symptoms associated with regurgitation. If the condition has been prolonged, an examination of the throat area will be performed to determine the extent of any long-term damage. X-rays and other forms of diagnostic imaging procedures may also be used to examine internally for damage.