Hiccups

Cause of Hiccups:

• Ischemia of the diaphragm, that is, lack of blood supply to the diaphragm

Recommendations:

• Take a deep breath and hold the breath. Exhale gradually.
• Take a paper bag and hold the edges of the opened bag near your nose. Inhale and exhale in the brown bag. Continue this for 1-2 minutes.
• Mix 1 tsp of honey and 1 tsp of castor oil. Dip your index finger in it and lick the finger. Do this every 2-3 minutes.
• Taking an enema with warm sesame oil can be helpful if the hiccups are being caused by constipation. 

Pranayama Recommended:

• Alternate Nostril Breathing for 5 minutes

Serious Hiccups that need medical attention:

• Cardiac Hiccups which occur in people having a congestive heart failure
• Uremic Hiccups which occur in people dur to renal failure and toxicity of uric acid in the blood
• Cerebral Hiccups 
• If hiccups continue for longer than 2 days.

Reference: 

Primary Reference: The Complete Book of Ayurvedic Home Remedies - Vasant D Lad - Part 3