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Use a saline nasal spray. Get a neti-pot. Take oral decongestants. Use a medicated nasal spray. Take an oral antihistamine product if your sinus pressure is caused by allergies. Take over-the-counter pain medications.
A saline nasal spray helps to clear your nasal passages of mucus, and to moisturize your nasal passages. Use the spray as directed, and be patient. The first couple of uses may be helpful, but it will likely take repeated uses to get the full benefit. A neti-pot is a device that resembles a small teapot. Used correctly, a neti-pot flushes out mucus and trapped irritants, and moisturizes your sinus passages.  The device works by putting saline or distilled water in one nostril and allowing it to drain out the other, removing unwanted irritants and germs, and provides a moisturizing and soothing effect to the sinuses. A neti-pot can be purchased inexpensively over-the-counter. Talk to your doctor before taking over-the-counter products if you have existing medical conditions, such as hypertension, diabetes, and glaucoma. Products like these can be helpful, but they don’t work for everyone.  Oral decongestants contain the active ingredients phenylephrine and pseudoephedrine. The more common side effects caused by these products include nervousness, dizziness, feeling that your heart rate is increased, slight elevations in blood pressure, and sleep problems.  Oral decongestants work by narrowing blood vessels in the nasal passages, helping the swollen tissues to shrink. This improves the flow of mucus to reduce the pressure and the flow of air so you can breathe easier.  Products that contain pseudoephedrine, originally marketed as Sudafed®, can be purchased without a prescription but are kept behind the pharmacy counter due to concerns about inappropriate use.  You will be asked to provide identification, like a driver’s license, and your purchase will be recorded. This is only done for your safety to control the illegal use of pseudoephedrine. Decongestant nasal sprays or drops are also available over-the-counter but should be used with caution. While these products can help to clear sinus passages and relieve the pressure quickly, using them for more than 3 days results in a rebound effect. A rebound effect means that your body adjusts to the medications being used, and the congestion and pressure returns, or is possibly worse than before, when you try to stop using them. Limiting their use to no more than 3 days prevents that rebound effect. Sinusitis, or sinus pressure and congestion, can be caused by allergies. Taking an over-the-counter antihistamine, such as Claritin®, Zyrtec®, or their generic equivalents, can help to control the allergic response and relieve the symptoms you are experiencing. Acetaminophen, ibuprofen, or naproxen may help to reduce the discomfort associated with the sinus pressure. Taking ibuprofen or naproxen may also help to reduce some of the inflammation in the nasal passages. Other symptoms that may be helped by over-the-counter pain medications include the associated headache, and discomfort often described as an ache in the teeth.