Fishwort boiled water can be used to treat children’s lung-heat cough. Fishweed is a heat-clearing medicine, with heat-clearing effect, boiled water is effective for children’s lung-heat cough, the other evidence caused by cough is ineffective, especially not for cold cough. Fishweed is pungent in taste, slightly cold in nature, belonging to the lung meridian, with the effect of clearing away heat and detoxification (clearing away heat and toxicity in the body), eliminating carbuncle and pus (eliminating carbuncle and pus), and diuretic and diaphoretic (improving the problem of dribbling of urine and the problem of small amount of urination and inability to pass urine). This product is mainly used in the treatment of lung carbuncle spitting pus, phlegm-heat asthma and cough, hot diarrhea, heat drenching (burning and stinging pain during urination, accompanied by frequent urination and urgency, and discomfort of traction in the abdomen), carbuncle sores and poison. Because of the cold nature of this product, it should not be used in patients with deficiency cold of spleen and stomach (spleen and stomach weak and cold), deficiency cold disease. Clinical application of this product, side effects are relatively mild, a small number of patients may occasionally experience dizziness, stomach discomfort, burning sensation in the fossa of the heart, etc. after taking the drug; oral intake of a fishy odor. Coughers may not be able to achieve a good therapeutic effect with a single drug, you need to follow the doctor’s instructions under the guidance of the doctor, if necessary, the joint use of medication, do not blindly take medication, so as not to damage the body and aggravate the condition.