There is no cure or standard course of treatment for Bell's palsy. The most important factor in treatment is to eliminate the source of the nerve damage.
Bell's palsy affects each individual differently. Some cases are mild and do not require treatment because the symptoms usually subside on their own within two weeks. For others, the treatment may include medication and other therapeutic options.
Recent studies have shown that steroids reduce the risk of nerve damage and are an effective treatment for Bell's palsy. An antiviral drug such as acyclovir, used to fight viral infections, combined with an anti-inflammatory drug such as the steroid prednisone may also limit or reduce damage to the nerve. Analgesics such as aspirin, acetaminophen, and ibuprofen may relieve pain. Because of possible drug interactions, patients taking prescription medicines should always talk to their doctors before taking any over-the-counter drugs.
Another important factor in treatment is eye protection. Bell's palsy can interrupt the eyelid's natural blinking ability, leaving the eye exposed to irritation and drying. Therefore, keeping the eye moist and protecting the eye from debris and injury, especially at night, is important. Lubricating eye drops, such as artificial tears or eye ointments or gels, and eye patches are also effective.
Physical therapy to stimulate the facial nerve and help maintain muscle tone may be beneficial to some. Facial massage and exercises may help prevent permanent contractures (shrinkage or shortening of muscles) of the paralyzed muscles before recovery takes place. Moist heat applied to the affected side of the face may help reduce pain.
Other therapies that may be useful for some individuals include relaxation techniques, acupuncture, electrical stimulation, biofeedback training, and vitamin therapy (including vitamin B12, B6, and zinc), which may help nerve growth.
This answer is based on source information from the National Institute of Neurological Disorders and Stroke.