The correct way to use Fishwort is to take decoction of water or pounding juice, can also be used externally, pounding compress or decoction of soup fumigation of the affected area. Fishy grass belongs to a flavor of Chinese medicine, its taste is pungent, nature is slightly cold, it has the effect of clearing heat, detoxification, but also diuretic and diuretic, in addition to carbuncle and pus effect; fishy grass on lung carbuncles and coughs, carbuncles and swelling of fever, urinary tract infections also play a role, but also for phlegm fever and hot diarrhea coughing and wheezing; in the use of fishy grass can be decocted to be taken internally or pounded juice to be taken, but also pounded or decocted to be washed. Its contraindications are not clear, it should be noted that patients with cold syndrome is prohibited, negative sores should not be used to avoid serving patients. If you need to use fishweed, it is recommended to use under the guidance of a traditional Chinese medicine practitioner to identify the evidence, individuals should not use blindly, so as not to cause adverse consequences.