It will improve. Bird's nest has the effects of health care, nourishing yin, moistening lung and not drying; Beauty care makes skin smooth, elastic and shiny; Supplementing qi and invigorating middle energizer, promoting blood circulation, improving digestion of stomach and absorption of intestine. Besides the skin, bird's nest is especially good for the lungs. Indonesian Chinese will give their children bird's nest for a long time to improve if they have pneumonia or asthma. Sometimes children cough badly after catching a cold, and it is useless to take medicine. Just feed some bird's nest every morning, and it won't take long for it to be greatly improved.