Causes And Complications Of Bell's Palsy

Respiratory Illnesses

Various viruses cause respiratory illnesses involving the upper part of the respiratory system, such as chest colds or bronchitis. Symptoms include coughing, chest congestion, sneezing, sore throat, fever, headache, wheezing, and some difficulty breathing. Evidence indicates some individuals who develop Bell's palsy had a recent bout with viral upper respiratory illness. Just as with coxsackievirus, it's possible the viruses that cause chest colds remain dormant in the body after the individual recovers. These viruses may also attack the cranial nerve that controls the facial muscles, resulting in symptoms of Bell's palsy.

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Cold Sores

Cold sores are blistery lesions that appear around the mouth caused by a virus known as herpes simplex. It's spread by direct contact with the virus, such as by kissing, sharing drinking glasses, and through sexual contact. Once an individual is infected with herpes simplex, it never leaves the body. The virus is permanently hiding, reappearing now and then, often in response to stress or a weakened immune system. Herpes simplex can be transmitted even if no symptoms are present. Because the virus has an affinity, or preference, for nerve cells, it's suspect as a causative agent for Bell's palsy, which is caused by damage to the seventh cranial nerve.

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