After male cats are sterilized, testicular swelling time varies from person to person. In general, the male cat's neutered ball will gradually reduce swelling within 1-2 weeks after operation. After the operation, you can observe the size of the ball to determine whether the swelling has eased. If the testicles are very swollen after operation and do not improve within two weeks after operation, or there are other abnormal symptoms, it is best to consult a veterinarian in time. Proper rest and keeping the wound clean after operation also contribute to the swelling of the ball. It is important to follow the veterinarian's instructions to ensure that the male cat has proper rest and recovery.