Many areas of China have in the doors and windows hanging calamus, or drink with its brew to drive away the poison to avoid the plague folk customs. Acorus calamus root into medicine, with a pungent open, bitter dry, warm and aromatic go through the medicinal properties. Into the heart meridian has the effect of opening the body and waking up, open phlegm and turbidity, benefit the heart and wisdom, calm the mind, ears and eyes, such as frequent headaches, head heavy, nasal congestion people can make their own calamus scented capsule to wear in front of the chest, can play the role of opening the brain. Into the stomach is damp and turbid, wake up the spleen and stomach, the movement of stagnation, eliminating the function of fullness, such as the tongue yellow and white greasy turbid, gas is not smooth patients, often with the medicine into. Therefore, calamus is very suitable for Lingnan hot and humid climate. Guangdong Provincial Dermatology Hospital of Chinese and Western medicine combined dermatology Ren Ying Ying Dragon Boat Festival in ancient times, in addition to commemorating the patriotic Qu Yuan and Wu Zixu, or an important festival of health and epidemic prevention. Dragon Boat Festival in the lunar calendar in mid-summer in May, all kinds of snakes, insects, rats and ants are out of activity, the so-called “five poisons and out”, is also prone to epidemic season, therefore, the ancients saw it as “poison month evil day”. People in this day to do health, hanging mugwort, hanging calamus, smoked atractylodes, Angelica dahurica, sprinkling Xiong Huang water, drinking Xiong Huang wine to sterilize and prevent disease, and to carry out various sports and fitness activities such as dragon boating, can really be considered our traditional health epidemic prevention festival. This article introduces you to the calamus, is one of the protagonists of this festival. Calamus, is a common and common perennial herbaceous plants, common with calamus, water calamus, as well as stone calamus variant money calamus, fragrant seedlings calamus, etc., they share common characteristics are the leaves are slender, fragrant and biting smell. And in the mountain streams and stones on the growth of the stone calamus, the smell and form of the most authentic, in the “Shen Nong Ben Cao Jing” is a traditional Chinese medicine “top”, the medicinal value is quite high. Acorus calamus blade is sword-shaped, high ornamental value, the Fang Shi called it “water sword”, “Pu sword”, you can “cut a thousand evil”. The ancients to calamus for the sword, to moxa for the whip, to garlic for the hammer, that can return snakes and insects, by the plague, to drive away poison and avoid evil. Every Dragon Boat Festival, in addition to internal diseases, dermatology use calamus place is also very much. Such as many areas with calamus leaves boiled water to children’s bath to prevent skin sores, repel the custom of mosquitoes and insects. Acorus calamus is also commonly used to decoct water fumigation treatment of eczema, scabies and other skin diseases, with obvious itching, swelling, pain relief. Acorus calamus in ancient formulas also have a lot of combined use of records, such as the “Women’s good formula” used to treat “red and white belt”, “experience formula” in the treatment of “carbuncles and swelling hair back”, “Ji urgent immortal formula” in the treatment of “Yin sweat itchy “, “Yin odor”, etc., are related to skin and reproductive system infections. Modern medical research shows that calamus rhizomes and leaves are relatively rich in volatile oil, internal use can analgesic, promote the secretion of digestive juices, relieve smooth muscle spasm, external use is common pathogenic skin fungi have inhibitory effect. Any doctor tip: If the home to prepare their own calamus lotion to assist in the treatment of eczema, ringworm, folliculitis and other infectious, pruritic skin diseases, dry product calamus and water ratio is appropriate in 1: 10, that is, 100 grams of calamus with 1000 ml of water, and the proportion of fresh products can be added to 2: 10, boiling water for about 10 minutes, the fragrance emitted when the fire, to slag, to be put in solution when the warm fumigation or scrubbing the affected area.