hiccups are common and usually harmless. however prolonged hiccups can result in some awful and sometimes dangerous after-effects. insomnia from hiccups can lead to exhaustion; his stress levels and blood sugar can increase. on the other hand continuous hiccups can cause him to lose his appetite lead to dangerous drops in blood sugars and weight loss. most commonly ulcers of the stomach and medications cause hiccups. but there's a longer list of more serious conditions that can be the cause of hiccups. a visit to the doctor for an evaluation and treatment may be needed. in the meantime simple maneuvers like holding your breath sipping cold water or gargling with water may help.
my father having hiccups continuously since 3 days and he is diabetic.