Perilla leaf is usually decocted and its effects include dispersing cold and relieving symptoms, promoting the flow of qi and resolving phlegm (promoting the flow of qi to resolve phlegm). Perilla leaf has the effects of dispersing cold and relieving symptoms, promoting the flow of qi and resolving phlegm, stabilizing the fetus, and relieving the poison of fish and crab. It is used in treating wind-cold syndrome, cough with excessive phlegm, chest and epigastric distension, nausea and vomiting, abdominal pain and diarrhea, discordance of fetal qi, malignant obstruction of pregnancy (in early pregnancy, there is severe nausea and vomiting, dizziness and anorexia, or even vomiting when eating), and poisoning by eating fish and crabs. It should be noted that people with Yin deficiency, Qi deficiency and warm diseases should take Perilla frutescens with caution. If the patient has any discomfort, please go to the regular medical institutions; if you need to use perilla leaves, must be used under the guidance of a professional doctor.