The river clams in the title should refer to the Chinese herb clamshells, which are effective in resolving phlegm, stopping coughing, dispelling dampness and harmonizing the stomach. Shells should not be used by pregnant women, and are contraindicated in cases of allergy. Clamshell belongs to the family of medicines for resolving phlegm, relieving coughs and calming asthma (stopping coughs and calming wheezing), and belongs to the family of shells of river corbiculae of the family Corbidae or its relatives. Clamshell, also known as flat snail, taste salty, warm, into the lung meridian, stomach meridian. Shells can be used internally and externally, long for the treatment of ulcers, phlegm, cough, stomach pain and acid swallowing (swallowing the acid in the stomach upward oropharynx), regurgitation and vomiting, wet sores, foot fungus and so on. The adverse effects of clamshell are not clear at the moment. Patients are advised to seek prompt medical attention if they are unwell, and if necessary, please use it under the guidance of a professional Chinese medicine practitioner to avoid delays.