When combined with the release of body chemicals from the inflamed sinus tissue, reactivity and inflammation of the airways may increase. Symptoms include thick, yellow or green mucus, headache, fever, postnasal drip, sore throat and cough. Fortunately, antibiotics can help clear up sinusitis and other bacterial infections. The human body has developed an intricate system for getting rid of harmful foreign substances such as bacteria and viruses. When one of these enters the body, the immune system begins to manufacture antibodies to fight them off.
Most people can breathe in pollen, dust, and dander with no problem.
But for people who are allergic to these ordinary everyday things, these substances present more serious consequences. They set off a complicated chain reaction in which the body works hard to expel them. That's why your nose runs, your eyes water, you sneeze and cough. Even for doctors, it's often hard to tell, because the symptoms are so similar. Colds usually begin with a sore throat, or turn into one somewhere along the way.