Peppermint tea is sometimes recommended after surgery due to its effects on digestion. Peppermint relaxes the muscles along the intestinal tract and can help patients to pass excess gas which may follow an operation. Some studies have also shown that peppermint oil may ease the nausea brought on by anaesthesia. More generally, peppermint oil can relieve a number of digestive ailments including indigestion or irritable bowel syndrome (IBS). The menthol inside peppermint is also a decongestant and can thin mucus to relieve blocked noses or coughs when we have a cold or flu.
Answered by Alex Cheung