A cat with a bulging belly but eating and drinking normally may be caused by obesity, pregnancy, ascites, or hairball syndrome. It is best to take the cat to the pet hospital for examination to confirm the cause and then treat it in time to avoid delaying the condition. It is necessary to control the cat's diet to avoid excessive obesity. At the same time, the cat should be fed cat grass or hair removal cream regularly to prevent hair ball disease.

Cat hairball syndrome is caused by the barbs on the tongue catching the hair when the cat is grooming itself and swallowing it into the stomach. In the long run, it will remain in the cat’s stomach Hair balls form inside.