Potential causes of vomiting and a swollen butt in cats include:
1. Gastrointestinal Obstruction: A foreign object, such as a toy, piece of string, or bone, may be lodged in the cat's digestive tract, causing vomiting and discomfort.
2. Urinary Obstruction: A blockage in the urethra, which is the tube through which urine exits the body, can cause difficulty urinating, leading to a swollen bladder and vomiting due to discomfort and pain.
3. Perianal Abscess: An abscess, or collection of pus, can develop in the area surrounding the anus. This can cause pain, swelling, and difficulty defecating, which may lead to vomiting.
4. Pancreatitis: Inflammation of the pancreas, a gland that produces digestive enzymes and insulin, can cause vomiting, abdominal pain, and diarrhea.
5. Toxin Exposure: Ingestion of toxic substances, such as household cleaners, plants, or medications, can cause vomiting and other symptoms, depending on the type of toxin involved.
6. Liver Disease: Liver dysfunction or disease can lead to vomiting, abdominal discomfort, and swelling due to fluid accumulation (ascites).
7. Kidney Disease: Advanced kidney disease can cause fluid retention, leading to swelling and vomiting.
8. Viral or Bacterial Infections: Infections like feline leukemia virus, feline immunodeficiency virus, or bacterial infections can cause a variety of symptoms, including vomiting and swelling.
It's crucial to seek professional veterinary care to determine the exact cause of your cat's symptoms and receive appropriate treatment. The veterinarian will perform a thorough physical examination, run necessary diagnostic tests, and develop a treatment plan based on the underlying condition.