Respiratory Issues
Another possible yet rare cause of hiccup is respiratory issues such as pleurisy, pneumonia, or asthma. In general, these conditions tend to affect your throat and breathing patterns, which can irritate your diaphragm and lead to hiccups. In earlier stages, however, it is difficult to determine if these health issues are the main causes of your hiccups. But when the problems get worse, hiccups tend to disappear and can be replaced by other serious conditions such as shortness of breath, heart palpitations, or nausea. Since these are severe cases, keep in mind to seek medical attention from your doctor as soon as possible to avoid further complications. [9]
