The weather gradually turns cool, the temperature difference between day and night is big, dry and changeable climate, it is easy to lead to a significant decline in human immunity. Cough is also divided into different types, we are usually familiar with exogenous cough are "cold cough", "wind heat cough", "accumulated food cough", "internal injury cough" and so on, so when cough occurs, how to distinguish cough?

Wind cold cough: white tongue, itchy throat, phlegm clear, transparent, foam with nasal congestion, sneezing, runny nose. It is necessary to disperse wind and cold, and relieve cough.

Wind heat cough: red tongue, yellow tongue coating, accompanied by sore throat, thick phlegm, difficult cough, yellow and thick nose, dry stool, yellow urine, fever. It is necessary to remove wind, clear away heat and relieve cough.

Accumulated food cough: thick and greasy tongue coating, mouth breath, red tongue, round stomach, flatulence, hot palms and feet, dry stool. It is necessary to eliminate food stagnation, cough and phlegm. The spleen is the source of phlegm, and the lung is the Qi of storing phlegm.

Cough caused by internal injury: long term repeated, chronic cough or mycoplasma, dry cough, little or no sputum, severe cough sooner or later, thick or no tongue coating, dry tongue. There was no tongue coating injury (stomach qi). Need to raise lung cough, spleen qi.