People with chronic sinus problems who are constantly blowing their noses understandably want the goo gone. Over-the-counter antihistamines and decongestants are one way to do this. Decongestants cause the blood vessels in the lining of the nose to narrow, reducing blood flow to the area, so you're less congested and you produce less mucus.
Decongestants are fine for when you can't breathe due to a cold, but they're not so good for thick mucus in general. "The reason is the decongestants dry you up and they make the mucus thick, and often the opposite effect happens because you feel like you have thick mucus," Johns explains. So you take more decongestants and get into a vicious mucus-producing cycle. Decongestants also have side effects, which include dizziness, nervousness, and high blood pressure.
Antihistamines block or limit the action of histamines, those substances triggered by allergic reactions that cause the tissue in the nose to swell up and release more, thinner mucus (a runny nose). The main side effect of older antihistamines is drowsiness. They also can cause dry mouth, dizziness, and headache.
You should also check your Breathing. Learning how to Breathe Naturally – in through the nose and out through the nose or mouth – when exercising or exerting yourself – can change your life for the better. .