Do we know what causes hiccups?
Yes, hiccups occur when the diaphragm, the large sheet of muscle between the chest and the abdomen, goes into a spasm. This muscle assists in breathing which is why it causes a person to inhale and make a funny sound.
The cause can be from eating or drinking too fast, sudden changes in the air temperature, even stress can cause it to happen to some people. Smoking is another reason why people sometimes get this muscle spasm.