7. Symptoms are felt in one area
If you are capable of localizing your symptoms and definitely can tell where you feel them, then, depending on where those sensations come from, you may be suffering from a whole range of different illnesses. As a rule, the entire upper respiratory system is affected by the common cold while other diseases can be recognized by intense symptoms in one location. Your teeth will hurt if you have sinus infection and swollen tonsils will lead to pain in one ear.