Have you ever felt like you're "still not feeling well" after recovering from COVID-19? Maybe you're forgetting things, or feeling foggy or confused. You're not alone, many people have experienced this. In fact, about 1 in 7 people who get COVID-19 develop some sort of symptom or side effect that affects their brain function. This doesn't mean the virus is directly attacking the brain. But the complications it causes can range from temporary confusion to, in severe cases, stroke or seizures.
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What are the possible complications of the brain?
"Brain fog" is a term used to describe a series of symptoms related to mental functioning that can persist for months after the virus has cleared. It's more accurately described as a foggy feeling in your head. These side effects usually appear a few weeks after COVID symptoms, such as fever and chills, have subsided. About 20% of people who get COVID experience temporary short-term memory loss , difficulty concentrating , and fatigue .
There have been reports of more severe effects in some people. Doctors believe that this may be due to a severe course of the disease or prolonged low oxygen levels in the body.
The most important thing is, if you have a symptom like this, don't ignore it. It may be normal, but it's wise to seek medical advice.
Let's look at the table below to see what effects COVID-19 can have on the brain.
| Symptom or effect | A simple explanation |
|---|---|
| Confusion | Inability to concentrate, confusion about where you are and what time it is. |
| Loss of smell and taste | This is a common symptom that many people experience early on. |
| Headache | Frequent or severe headaches. |
| Difficulty concentrating | Inability to concentrate properly at work, while reading a book, or during a conversation. |
| Behavioral changes | Changes such as getting angry quickly and feeling sad for no reason. |
| Tinnitus | A constant "ringing" sound in the ears. |
| Seizures | A condition in which the body shakes uncontrollably. This is a severe symptom. |
| Loss of consciousness | Temporary loss of consciousness and falling. |
| Stroke | A serious condition caused by the blockage or rupture of a blood vessel that supplies blood to the brain. |
In addition, some people also develop problems with the nervous system outside the brain and spinal cord. An example is Guillain-Barré syndrome (GBS) . This is when the body's immune system attacks the nerves. This can cause breathing problems or even death. However, this is a very rare condition. Research is still ongoing into the link between COVID and GBS.
How does Covid-19 affect the brain?
Scientists still don't know 100% exactly why this happens, but they have a few theories.
1. Due to a severe infection
One possible reason is that the virus enters our central nervous system (that is, the brain and spinal cord) and causes a sudden infection. Genetic fragments of this virus have been found in the spinal fluid of some patients. Perhaps the virus enters the blood or nerve endings and does this. This is also thought to be one reason for the loss of smell. That is, the virus can enter the brain through the part called the 'olfactory bulb', which is located near the nose and carries information about smell to the brain.
2. Hyperactivity of the immune system
Another theory is that when our immune system fights the COVID-19 virus, it sometimes becomes overactive. This excessive inflammation can damage our own tissues and organs. Sometimes, this reaction can be more damaging than the virus itself.
3. Changes in the body
Another theory is that other changes in the body caused by COVID-19 (for example, high fever, low oxygen levels, or other organ failure) can cause or increase the risk of brain complications. This can lead to delirium or even coma in severe COVID patients.
4. Blood Clotting
Finally, COVID-19 patients are at increased risk of blood clots . This increases the risk of stroke. These blood clots can form in the deep veins of the body or in the lungs. But if they block the arteries that supply blood to the brain, it can lead to a stroke.
What do you do if you have these symptoms?
If you experience any neurological changes or symptoms like the ones we've discussed after you've recovered from COVID-19, it's best to see your doctor right away . He or she can treat your symptoms and help you recover quickly.
Don't just assume, "This will go away in a few days." It could be an early sign of something more serious. That's why it's important to talk to a doctor.
Doctors are still studying the connection between Covid and the brain. So, making them aware of your concerns will help them find ways to treat patients like this in the future. So, don't be afraid or hesitant to talk to your doctor about this.
💡 Take-Home Message
- Symptoms of COVID-19 include memory loss, difficulty concentrating, and 'brain fog'. These symptoms usually appear a few weeks after recovery.
- These effects can range from mild to severe conditions such as stroke.
- There are theories that this may be due to factors such as the virus itself affecting the nervous system, an over-response by the body's immune system, decreased oxygen levels, and blood clotting.
- If you experience any of these neurological symptoms after recovering from COVID, do not ignore them and consult your doctor immediately for advice .
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