>>937396560 (OP)They are simply muscle spasms of your diaphragm.
Don't hold your breath; because you are only going to try to inhale more air before you do it, causing you to hiccup more.
Reduce the amount of oxygen by breathing into a plastic bag (not paper). Over time, the air in the plastic bag will contain more carbon dioxide and your diaphragm will relax.
Also, lay on your back and put your hands just below your rib cage, warming your diaphragm. This will help relax your diaphragm.