Bell's palsy

Sometimes one side of your face stops moving.

This can make your eyebrow droop. It can also change how things taste. It might even make sounds seem very loud.

This happens because a tiny nerve in your face gets swollen. This nerve helps you smile and blink. When it is swollen, it cannot send signals well. This makes the muscles weak.

Most people feel better in a few weeks. Some people feel better in just two weeks. It can take up to six months to be all better. This happens to people of any age.

Bell's palsy is a way the face becomes weak on one side.

This makes it hard to move facial muscles. You might see a drooping eyebrow or a drooping mouth. Some people also have trouble tasting food. Even sounds might seem much louder than usual. This is called hyperacusis.

This happens because of a problem with the facial nerve. This nerve is also called cranial nerve VII. It sends signals to the muscles that help you smile or blink. Doctors think a virus might cause the nerve to swell. This swelling puts pressure on the nerve inside a small bone canal. The pressure stops the nerve from sending signals clearly.

Most people get better on their own. Signs of getting better often start in 14 days. Full recovery can take up to six months. Doctors may use corticosteroids to help. These are medicines that help stop swelling. It is also important to protect the eye. If the eye cannot close, use eye drops or an eyepatch. This stops the eye from drying out.

Bell's palsy is a condition that causes facial paralysis. This means a person cannot control their facial muscles on one side. Most people find the weakness is only temporary. It often improves significantly over a few weeks. Symptoms can be mild or they can be quite severe. You might see muscle twitching or a drooping eyebrow. In rare cases, it can affect both sides of the face. Some people also feel pain around their ear or notice a change in taste.

This condition happens because of a problem with the facial nerve. This is also known as cranial nerve VII. This nerve helps you blink, smile, and frown. It also helps you taste food on the front part of your tongue. It even helps your ear dampen loud sounds. When the nerve has a problem, sounds might seem too loud. This is called hyperacusis. Doctors think a virus might cause the nerve to swell. This swelling creates pressure inside a narrow bony canal. The pressure stops the nerve from sending signals to the muscles.

A Scottish surgeon named Charles Bell first described this. He lived from 1774 to 1842. He was the one who found the link between the nerve and the condition. Even though we know the nerve is involved, the exact cause is still unknown. Some people think a virus causes the swelling. Others think it might be related to things like diabetes or pregnancy. It can happen to anyone at any age.

Bell's palsy is very common for one-sided nerve paralysis. It accounts for about 70% of those cases. It happens to 1 to 4 people out of every 10,000 each year. About 1.5% of all people will have it at some point. Most people between ages 15 and 60 are affected. Males and females are affected at the same rate. Signs of getting better often start within 14 days. Most people recover completely within six months.

Doctors must rule out other things to make this diagnosis. They check to make sure it is not a stroke or a tumor. A stroke usually allows you to move your forehead. Bell's palsy is different because it affects the whole side. To help, doctors might use corticosteroids to reduce swelling. These medicines work best if given within three days. It is also very important to protect the eye. If the eye cannot close, you should use eye drops or an eyepatch.

Bell's palsy is a specific type of facial paralysis. It causes a temporary inability to control facial muscles on one side of the face. In rare cases, it can affect both sides. This condition is significant because it is the most common cause of one-sided facial nerve paralysis. It accounts for 70% of such cases. While it can be startling, the weakness is usually temporary. Most people see significant improvement over several weeks.

The condition is caused by a dysfunction of cranial nerve VII, also known as the facial nerve. This nerve is responsible for many important facial functions. It controls blinking, closing the eyes, smiling, frowning, and raising the eyebrows. It also manages salivation and the flaring of nostrils. Additionally, the facial nerve carries taste sensations from the anterior two-thirds of the tongue. It also innervates the stapedius muscle in the middle ear. This muscle helps dampen loud sounds. When the nerve fails, sounds may seem too loud, a condition called hyperacusis.

Scientists are still studying the exact mechanism of how this happens. The precise cause remains unknown. However, many researchers believe a viral infection causes the nerve to swell. This is known as inflammation or edema. As the nerve swells, it creates pressure within a narrow bony canal called the stylomastoid foramen. This pressure restricts blood and oxygen to the nerve cells. This restriction can block neural signals or damage the nerve itself. Some research suggests that the herpes simplex virus type 1 may cause demyelination. Demyelination is the damage to the protective coating of the nerve.

There are several risk factors associated with Bell's palsy. These include diabetes, pregnancy, and recent upper respiratory tract infections. Some believe the reactivation of dormant viruses, such as the herpes family, triggers the swelling. This includes the varicella zoster virus and the Epstein–Barr virus. Other infections like HIV and Lyme disease have also been linked to facial palsy. In areas where Lyme disease is common, it accounts for about 25% of facial palsy cases. There is also a suspected association with migraines. Furthermore, familial inheritance has been found in 4% to 14% of cases.

History tells us that a Scottish surgeon named Charles Bell first described this condition. He lived from 1774 to 1842. He was the one who identified the connection between the facial nerve and this paralysis. Today, doctors use a specific process to diagnose Bell's palsy. It is considered a diagnosis of exclusion. This means doctors must rule out other serious conditions first. They look to ensure the weakness is not caused by a stroke, a brain tumor, or meningitis. A stroke is different because it often allows a person to still wrinkle their forehead.

The statistics for Bell's palsy show how common it is. It occurs in 1 to 4 people per 10,000 every year. About 1.5% of the population will be affected at some point in their lives. It most frequently occurs in people between the ages of 15 and 60. Males and females are affected at equal rates. While the condition is often straightforward, some people experience "myriad neurological symptoms." These can include facial tingling, headaches, neck pain, or even balance problems.

Treatment focuses on improving recovery and protecting the body. Corticosteroids, such as prednisone, are often used to reduce inflammation. These are most effective when given within three days of the symptoms starting. Antiviral medications are sometimes prescribed, though their benefit is debated. Protecting the eye is a critical part of management. If a person cannot blink properly, the eye may dry out. Patients use eye drops, ointments, or even an eyepatch to keep the eye safe. Physiotherapy can also help maintain muscle tone. Most people show signs of improvement within 14 days. Complete recovery usually happens within six months.