Tumors in the sinuses can cause facial numbness, according to the American Cancer Society. Acute and chronic infections of the sinuses do not cause facial numbness, states Mayo Clinic.
Symptoms of facial numbness can also be caused by strokes, migraines and hypothyroidism, according to Facial Health. Infections of the sinuses, both acute and chronic, commonly cause pain, pressure and tenderness in the facial area, not numbness. Patients may also experience congestion, discharge of mucus and post-nasal drip, notes Mayo Clinic. Symptoms of a tumor in the sinuses may include pain, congestion, and post-nasal drip, according to the American Cancer Society.