Sinusitis involving the sinuses in the cheekbones can cause pain in the upper rear teeth. Treating the sinusitis leads to relief of the related tooth pain.

Dangerous complications of infectious sinusitis are rare but potentially life threatening. Signs and symptoms affect the eyes, facial bones and nervous system.

Both seasonal allergies and sinus infections can make you feel congested and miserable, and sometimes it's difficult to tell them apart. In addition, allergies and sinus infections are linked; nasal blockage caused by allergies can increase risk of sinus infections.

A sinus infection is the inflammation of the sinus cavity due to a virus, bacteria or fungus, according to MedlinePlus.

The sinuses are made of small cavities that are lined with mucus membranes. A sinus infection is the inflammation of the sinus cavity that causes the mucus membranes to swell and produce high levels of mucus. The pressure caused by sinus inflammation results in sinus headaches felt in the eyes, ears and temples.

Sinus infections occur when the lining of the sinus cavity becomes swollen, irritated and inflamed, blocking normal drainage, according to the Mayo Clinic. Due to blockage, mucus builds up within the sinuses and bacteria sets in, leading to an infection.

Your sinuses are the tiny air-filled pockets located along your eyes, nose, cheekbones and forehead. While sinus infections often stem from a cold or some other upper respiratory infection, they can also be triggered by allergies, nasal problems or seasonal changes.

A sinus rinse using salt water will help you clear up a sinus infection and help you breathe better. The salt in the rinse creates an alkalizing environment that kills bacteria, according to the Pediatric Oncology Resource Center. Additionally, salt dehydrates mucus, which is a breeding ground for airborne pathogens.

Amoxicillin is an antibiotic used to treat various types of infection. If you are taking insulin for diabetes or other diseases, taking amoxicillin might give you cause for concern.

If you love spicy food, you're probably well aware that your nose runs and your eyes water when you eat it. In fact, you may eat spicy food when your sinuses are congested in the hopes of finding some relief. Some spicy foods can help you clear a stuffy nose.

A sinus infection, or acute sinusitis, causes the sinuses around your eyes and nose to be inflamed and swollen. The swelling interferes with drainage and causes mucus to build up. You may be congested, have a headache or even have fever.

A sinus infection, also called sinusitis, may be caused by a virus or a bacteria. Most of the time, according to Mayoclinic.com, antibiotics are not necessary to treat sinusitis because the infection usually clears up on its own.