Common symptoms of Bell's palsy include a loss of the ability to taste, pain behind or in the ear, numbness in a portion of the face, and increased sensitivity to sound, according to WebMD. Many patients experience paralysis or weakness in the face that causes drooling.
Movement and coordination problems faced by patients with Bell's palsy may include stiff or floppy muscle tones, exaggerated reflexes, a lack of coordination with muscles, and slow movements, according to the Mayo Clinic. Some patients with Bell's palsy may experience involuntary movements or tremors, delays in sitting up or pushing up on arms, or a favoring of one side of the body. Additional symptoms include problems with swallowing, difficulty speaking or delays in speech development, and difficulty eating or sucking.
Neuorological symptoms associated with Bell's palsy include difficulty with hearing and vision, oral diseases, seizures, and abnormal pain perceptions, according to the Mayo Clinic. Some patients experience intellectual disabilities or psychiatric conditions. In some cases, Bell's palsy symptoms are limited to one side of the body or one limb. The disability can affect the whole body, though.
The cause of Bell's palsy is unknown, as of 2015, however, some health experts believe that the disease is caused by the herpes virus, explains WebMD. In many cases, the damage to the nerves that control muscles in the face is damaged by inflammation.