Garlic has a certain bactericidal effect, for some viral or bacterial infections, has a certain anti-inflammatory effect. If the infection in the lungs caused by coughing, garlic can help eliminate lung inflammation, lung inflammation disappears or partially relieved, relatively speaking, the cough can be relieved, not directly against the cough, but through the anti-inflammatory antibacterial to achieve the effect of cough. Garlic due to the pungent stimulating effect, the phlegm also has a certain help, due to phlegm secretion caused by irritating cough, garlic also has a certain role. If the cough is due to lung qi deficiency or yin deficiency, i.e., insufficient lung qi, or a cough with heat evidence, the application of garlic is not suitable.