Laughter or intense emotions. Changes in temperature. Your own observation of symptoms. They will subside on their own or often with the treatment discussed below. Continued hiccups can be debilitating and require medical attention to determine the cause.
Prolonged hiccups require medical care.
Try one or more methods to see which works best for you. Hold your breath and count to 10. Breathe into a paper bag and rebreathe air in the bag. Don't use a plastic bag because it may cling to nostrils. Press a forefinger into each ear for about 20 seconds.