The invention discloses an external traditional Chinese medicine for treating red and swollen rash. The external traditional Chinese medicine is prepared from the following raw materials in parts by weight: 8-10 parts of Chinese violet, 3-4 parts of zaocys dhumnade, 2-4 parts of golden cypress, 20-25 parts of mother chrysanthemum, 5-6 parts of scouring rush, 2-4 parts of honeysuckle stem, 5-7 parts of pericarpium arecae, 1-3 parts of cotex dictamni, 2-4 parts of honey-fried licorice root, 6-10 parts of pomegranate bark, 3-5 parts of tribulusterrestris, 2-4 parts of groundsel, 1-2 parts of cortex lycii radicis, 5-7 parts of spina gleditsiae, 3-5 parts of Beautiful Sweetgum Fruit, 6-8 parts of Urtica root, 2-5 parts of oriental sesame seed, 1-3 parts of lucid phymatodes rhizome, 2-3 parts of broadleaf globethistle inflorescence and 5-10 parts of common Mirabilis jalapa leaf. All the medicinal raw materials are combined to achieve the curative effects of clearing heat, removing dampness, expelling toxins, cooling blood, dispersing blood stasis and relieving itching, the local microcirculation is effectively improved, and the skin metabolism is promoted; and moreover, the external traditional Chinese medicine disclosed by the invention does not have any toxic effect, can take effect quickly and is good in treatment effect, and the effective rate is 100 percent.