The spicy-tasting tea is made by cutting small pieces of fresh, peeled ginger root into boiling water. This is steeped for five to 10 minutes and then strained. Some people also add the white part of a scallion, which like ginger, is thought to make you perspire.
China is not the only country where ginger tea is popular. The herb also grows widely in India, where its tea is the traditional home remedy for a cold.
Dr. Arti Prasad grew up in India, did some of her medical training there and is now the founding executive director of the University of New Mexico Center for Life in Albuquerque.
She said she would squeeze or crush ginger to get fresh juice. Then mix a tablespoon of the fresh juice in a tablespoon of honey and lick a little bit of this syrupy blend every few hours throughout the day. "This remedy is good for a cold or a cough," Prasad said.
In Ayurveda (Indian medicine), ginger has both dry and sharp qualities, said Sonia Masocco, an instructor for Ayurvedic herbology at The Ayurvedic Institute in Albuquerque, N.M. The herb's dry qualities help to liquefy a cold, which may help stop a runny nose or watery eyes in its tracks. Ginger's sharpness is said to influence the quickness of its penetrating actions.
According to Masocco, the ratio used to make ginger tea in India is about four tablespoons of freshly cut slices of ginger root to one cup of water. She says the key to using this healing spice is its potency. Too much water will dilute the sharpness and dry aspects of ginger.
The tea is boiled or simmered into a pale yellow liquid that has a pungent taste. A ginger paste can also be applied to the chest or forehead to relieve congestion there.
Growing up in Canada as a member of the Mohawk tribe, Dr. Theresa Maresca learned to turn to the plants in her region for medicine. And if her throat started to feel scratchy, she would take a bite of "bitterroot," which is known among American Indians as a treatment for a sore throat or a cold.
Bitterroot goes by many other names including singer's root (the remedy is used for a hoarse voice), said Maresca, now a family medicine physician and director of the Native American Center for Excellence at the University of Washington School of Medicine in Seattle. "You can even find it sold at health food stores as calamus root or sweet flag."
You take a little chunk of bitterroot or bite off a piece, which tastes quite bitter, as its name suggests. The root is hard, and as it softens up, it becomes spongy so you can suck on it for hours, explained Maresca, who typically carries a small piece of it with her when she travels in case she feels a cold coming on.
Bitterroot might work to soothe an inflamed throat or quiet a cough by increasing the production of saliva. And because it also helps calm the stomach, it's sometimes considered "Indian Tums."
American Indians might also turn to teas to ease their cold symptoms. One traditional brew that Maresca likes to steep is a combination of the herb peppermint and yarrow. A medicinal plant, yarrow is thought to increase circulation and promote sweating to help bring down a fever. She describes the tea as pungent with a distinctive, but pleasant smell.