Signs and symptoms. Often the first symptom of Bell's palsy is a dull, aching pain behind or in the ear. This can be present for a day or two before facial weakness is noticed. While the involved side of the face may feel numb, it is still possible to feel if it is touched. Symptoms may include pain, swelling, or facial weakness or numbness. You may feel these symptoms in your teeth, jaw, tongue, ear, sinuses, eyes, salivary glands, blood vessels, or nerves. Common causes of facial problems include infection, conditions that affect the skin of the face, and other diseases.