Meningitis

Germs can make the skin around your brain swell.

This is called meningitis. It can make your head hurt a lot. Your neck might feel very stiff.

You might also feel very hot or sick. Some people get a red or purple rash. Small babies might just seem very sleepy. Doctors use medicine to help people get well. It is important to see a doctor fast. Staying healthy is very important.

Meningitis is a swelling of the protective layers around the brain and spinal cord. These layers are called the meninges.

This swelling can be caused by many things. Most often, it comes from germs like viruses or bacteria.

Some cases are not caused by germs at all. They can come from injuries or other health issues.

Symptoms can change depending on the person. Many adults feel a very bad headache. They may also have a stiff neck.

Other signs include a fever, vomiting, or feeling confused. Some people find bright lights or loud noises hard to bear. Small babies might just seem very sleepy or cranky.

Some types of meningitis cause a red or purple rash. This rash does not fade if you press a glass against it. Doctors must act fast because this is a medical emergency. They may use a needle to check the fluid around the brain. This helps them find the cause. Many people can stay safe with vaccines.

These shots help stop germs from making people sick.

Meningitis is a serious condition involving inflammation of the meninges. The meninges are the protective membranes that cover the brain and spinal cord.

Because these layers are so close to the brain, the swelling can be very dangerous. Doctors call this a medical emergency. This illness can be caused by many different things. Most cases come from infections like viruses, bacteria, fungi, or parasites.

Other causes include cancer, certain drugs, or bleeding in the brain.

Symptoms of meningitis can look different depending on a person's age. In adults, a severe headache is very common. It happens in almost 90% of bacterial meningitis cases.

Many adults also experience neck stiffness. This means they cannot easily move their neck forward. Other signs include fever, vomiting, and feeling confused. Some people may also find bright lights or loud noises hard to bear. Young children often show different signs. They might just be irritable, sleepy, or eat poorly. In babies, the soft spot on the head might bulge.

Doctors use special ways to find out if someone has meningitis. One way is a lumbar puncture. This is when a doctor uses a needle to collect cerebrospinal fluid from the spinal canal.

They look at this fluid to see if germs are present. Doctors also check for specific physical signs. They might look for a rash that does not fade when pressed with a glass. This is called a non-blanching rash. They may also check how a person's body reacts to certain movements. These tests help them decide how to treat the patient quickly.

There is important history and data regarding this illness. In 2019, about 7.7 million people were diagnosed with meningitis worldwide. Of those people, 236,000 died. This number is lower than in 1990, when 433,000 people died.

In some parts of the world, outbreaks happen every year. These occur between December and June in the sub-Saharan Africa meningitis belt. However, smaller outbreaks can happen in many other areas too. With the right treatment, the risk of death from bacterial meningitis is less than 15%.

We can prevent many types of meningitis through immunization. Vaccines can protect against germs like meningococcus, mumps, pneumococcal, and Hib.

These shots help the body fight off the infection before it starts. If someone is exposed to certain types of meningitis, doctors might give them antibiotics to prevent the spread. This is similar to how a shield protects you from a splash. Treating the illness quickly is the best way to avoid long-term problems. Without fast care, people might face deafness, seizures, or trouble with thinking and learning.

Meningitis is a medical emergency involving the inflammation of the meninges. The meninges are the protective membranes that surround the brain and spinal cord.

Because these layers sit so close to the central nervous system, swelling can be life-threatening. The term itself comes from the Greek word for membrane and the medical suffix -itis, which means inflammation. This condition can be acute, meaning it happens suddenly, or chronic, meaning it develops over time.

Most cases of meningitis are caused by infections. These infections may come from viruses, bacteria, fungi, or parasites. For example, some cases are caused by parasitic worms or amoebae. There are also non-infectious causes for this inflammation. These include malignancy, which is cancer, or a subarachnoid hemorrhage, which is bleeding in the space around the brain. Certain drugs or chronic inflammatory diseases like sarcoidosis can also trigger the condition.

In adults, the symptoms of bacterial meningitis follow a common pattern. A severe headache occurs in almost 90% of these cases. Neck stiffness is also very common, affecting about 70% of adults. This stiffness makes it difficult to flex the neck forward. Doctors often look for a "classic triad" of signs: sudden high fever, neck stiffness, and an altered mental status. However, all three signs are only present in about 44% to 46% of bacterial meningitis cases.

Doctors use specific physical tests to screen for the disease. One test is Kernig's sign, where a patient lies on their back with their hip and knee bent at 90 degrees. If pain limits the passive extension of the knee, the test is positive. Another is Brudziński's sign, where flexing the neck causes the patient's knee and hip to flex involuntarily. There is also the "jolt test," where a person rotates their head horizontally. If this movement does not make a headache worse, meningitis is considered unlikely.

Different bacteria cause meningitis depending on a person's age. In newborns, group B streptococci and Escherichia coli are common causes. Older children are more likely to be affected by Neisseria meningitidis or Streptococcus pneumoniae. In adults, these two bacteria together cause 80% of bacterial meningitis cases.

Some types, like meningococcal meningitis, can cause a specific petechial rash. This rash consists of small purple or red spots that are non-blanching. This means the spots do not fade when you press a glass against them.

To confirm a diagnosis, doctors often perform a lumbar puncture. During this procedure, a needle is inserted into the spinal canal to collect cerebrospinal fluid, or CSF. They examine this fluid to find evidence of infection. If meningitis is detected, treatment often involves antibiotics or antiviral drugs. Corticosteroids may also be used to reduce excessive inflammation. Rapid treatment is vital to prevent serious complications like deafness, epilepsy, or hydrocephalus.

The global impact of meningitis is significant. In 2019, about 7.7 million people were diagnosed with the condition worldwide. Of those, 236,000 people died. This is a decrease from 1990, when 433,000 people died. In some regions, like the "meningitis belt" in sub-Saharan Africa, outbreaks occur every year between December and June. However, with appropriate medical care, the risk of death from bacterial meningitis is less than 15%.