White gums in cats can indicate several health problems, with anemia being one of the most common causes. Anemia occurs when there's a low red blood cell count, which reduces oxygen flow to the gums, making them appear pale or white. Other possible causes include shock, blood loss, or even certain toxins. It's important to check for other symptoms like lethargy, loss of appetite, or rapid breathing. If your cat's gums are white, you should take them to a veterinarian as soon as possible for a proper diagnosis and treatment.