When should you take Hiccup seriously and consult a doctor ?

Brief episodes of Hiccups  do not require consulting a doctor. But when hiccups are persistent or accompanied by warning signs, immediate medical consultation is warranted.

• Warning signs: contact doctor immediately if neurological symptoms such as vomiting, weakness, numbness or loss of balance are present along with hiccups. 
• Persistent hiccups lasting for more than 2 to 3 days, doctor should be consulted to rule out serious underlying diseases.