Registration of cats was not mandatory in Sweden prior to January 1st, 2023. Hence the number of cats is underrepresented in national statistics. A few different estimations of the total number of cats have been published. In summary, it is possible that the total number of cats is approximately 1.4 million.
Talk to your attending veterinarian if you have questions about your cat. If your cat is sick, it is important that you quickly contact a practicing veterinarian no matter what the reason for the disease may be.