We often refer to the plant known as "dog's tail grass," but its official name is actually "Da Wei Yao," a plant of the purple grass family. It is used in traditional Chinese medicine as a whole herb. It is harvested in the summer and autumn and can be dried or used fresh. Traditional Chinese medicine believes that Da Wei Yao has the effect of clearing heat and detoxifying, and it is used to treat oral ulcers. Today, I will introduce the methods of using Da Wei Yao to treat oral ulcers!
【Methods of using Da Wei Yao to treat oral ulcers】
Mash fresh Da Wei Yao leaves into a pulp and use the juice as a mouthwash, four to six times a day.
Traditional Chinese medicine believes that Da Wei Yao has the effects of clearing heat, detoxifying, and diuresis. It is used for pneumonia, empyema, sore throat, oral ulcers, bladder stones, and abscesses.
1. "Selected Compilation of Guangxi Materia Medica": "Clears heat, detoxifies, drains pus, and reduces swelling."
2. "National Compilation of Chinese Herbal Medicines": "Clears heat, detoxifies. Used for pneumonia, lung abscess, empyema, diarrhea, dysentery, orchitis, diphtheria, oral ulcers, abscesses."
Internal use: decoction, 15-30g, fresh 50-100g; or mix the juice with honey and take orally. External use: use an appropriate amount to wash with decoction or use the juice as a mouthwash.
【Introduction to Da Wei Yao】
Da Wei Yao is also known as dog's tail grass or whole bug grass. It is an annual herbaceous plant, 15-60cm tall. The roots are cylindrical, turning yellow-brown when dried. The stem is erect, stout, and branches frequently, covered with rough hairs.
The leaves are opposite or nearly opposite; petioles are 2-5cm long; leaf blades are ovate or elliptic, 4-10cm long, 2-4cm wide, with a short or gradually pointed apex, and a rounded or truncate base that extends down to the petiole. The edges are slightly serrated or slightly wavy, and both sides are sparsely covered with short rough hairs. The inflorescence is in a raceme-like panicle, 5-20cm long, slender and curved, solitary, unbranched, terminal or opposite the leaves, without bracts. The flowers are small and densely arranged in two rows on one side of the inflorescence axis. The calyx is deeply divided into 5 lanceolate lobes, covered with rough hairs. The corolla is light blue or blue-purple, rarely white, tubular with a high foot-like disk, 3-5mm long, with 5 shallow lobes at the apex. The lobes are nearly circular, expanded, the throat is smooth without appendages. There are 5 stamens, hidden inside, attached to the base of the corolla tube. The ovary is small, with a very short style and stigma. The fruit is ovoid, 4-5mm long, with longitudinal ribs, divided into 2 deep lobes, and each lobe splits into 2 single-seeded carpels. The flowering period is from April to July, and the fruiting period is from August to October.
【Images of Da Wei Yao】
