Peripheral Bell’s palsy
The causes of Bell’s palsy are unknown. Bell’s palsy’s exact cause is still unknown, but it is presumed to be a paralysis caused by a viral infection of the 7th cranial nerve.The most common viruses include flu, herpes, adenovirus, mumps, hand-foot, -and- mouth disease.
- herpes simplex – cold sores and genital herpes
- herpes zoster virus – chickenpox and shingles
- Epstein-Barr virus – mononucleosis
- Adenovirus – respiratory infection
- Coxsackievirus- Hand-foot-and-mouth disease.
- Lyme disease – bacterial infection caused by infected ticks
Our immune system is depressed due to stress or overwork. When our defense system against viral infections weakens, we are more likely to get infected by the virus, increasing the likelihood of Bell’s palsy.
Ramsay Hunt syndrome
Ramsay Hunt syndrome is a facial paralysis caused by chickenpox and herpes zoster. Unlike Bell’s palsy, the cause of Ramsay Hunt Syndrome is clear. Once chickenpox has been overcome, the virus still lives in the nerves. When the body’s immune system is depressed, virus is reactivated, affecting the facial nerve. Because the shingles virus causes it, blisters and rashes can occur.
Ramsay Hunt syndrome causes pain in the back of the ear. Ramsay Hunt syndrome has a lower prognosis than Bell’s palsy and has a higher chance of sequelae.
Central facial palsy
Central facial palsy is the paralysis of the lower half of one side of the face. A stroke (cerebral hemorrhage, cerebral infarction) often causes this condition. In addition to a stroke, if a brain tumor or encephalitis invades the brain parenchyma’s facial nerve pathway, central facial nerve palsy may occur. Unlike peripheral facial palsy, central facial palsy can cause paralysis on one side of the arm and leg, and the face. Also, speech impairment, visual impairment, dizziness, nausea, and headache may occur.