5.Wheezing
This is when your breathing sounds like a whistle. If you wheeze, it’s a sign of a more serious infection like pneumonia or bronchitis, especially if it happens when you lie down. Wheezing also can be a sign of anaphylaxis, a severe allergic reaction to something you ate or an insect bite.
6.Cough With Mucus
You may have a mild, pesky cough from a cold, but if you cough up mucus — slimy stuff from deep down in your chest — it can be a sign of bronchitis or pneumonia, especially if there’s blood in it.
