Lianhua Qingdian generally refers to Lianhua Qingdian capsule, yellow phlegm and yellow nasal mucus caused by heat and toxin against the lungs is useful to eat Lianhua Qingdian capsule, and other evidence of yellow phlegm and yellow nasal mucus is ineffective to eat Lianhua Qingdian capsule, so it is necessary to be used in the identification of the evidence under the analysis. Lianhua Qingdao capsule, mainly has forsythia, honeysuckle, ephedra, bitter almonds, gypsum, fritillaries, patchouli, etc., has the effect of clearing the plague and detoxification (clearing the plague and heat poisonous evil), declaring the lungs and cathartic heat. Clinically, it is often used in the treatment of heat and toxicity attacking the lungs, the symptoms of which are high fever, nasal congestion, yellow runny nose, headache, dry throat, and so on. Note that after taking Lianhua Qingdian there may be nausea, vomiting, abdominal pain and other adverse reactions, and it is contraindicated for those who are allergic to this product and its ingredients. Yellow phlegm and yellow snot can be caused by heat and toxin in the lungs, but also by yin deficiency and lung heat, liver fire in the lungs, etc. Therefore, it is recommended to use the drug under the physician’s diagnosis and analysis.