Cat hiccups are generally caused by irregular spasms of the diaphragm under the ribs. It is a normal physiological phenomenon and mostly occurs in young cats. However, if a cat hiccups frequently, it may also be due to improper diet or a problem in the throat. If it is caused by foreign matter, you can feed a little probiotics and hair removal cream. If it does not improve, you need to take the cat to the pet hospital for examination to confirm the cause and treat it in time to avoid delaying the condition.