The influenza vaccine is one of the most importa vaccines that millions of people inject every year to avoid seasonal flu. It is true that this vaccine can preve symptoms of the disease, but it is the reality of it that, like other medications, can cause side effects. The complications of the flu vaccine are usually mild and temporary; However, getting to know them will help you to be aware of your body’s reactions after injecting it. In this article from DigiKala Mag, we will examine all the importa tips on the complications of the flu vaccine, from the most common symptoms to complications in children and pregna women. So join us.
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The usual timing table of the influenza vaccine complications
| Type of complication | Starting time | Lasting duration |
| Pain and redness of the arm | The same day or within hours of | 1-5 days |
| Fever and fatigue | 1-5 hours after injection | 1-5 days |
| Headache and body pain | 3 days later | 1-5 days |
| Allergic reaction | Within hours of injection | Depending on the severity |
Complications of the flu vaccine
Most people experience the complications after the flu vaccine, which are usually very mild and short -term. In fact, observing each of the side effects of this vaccine indicates the activation of the immune system. As we said, the complications of the flu vaccine are resolved within a few days and have no worries.
Pain or redness of the injection site
One of the body’s most common reactions to the flu vaccine is the feeling of pain or redness of the injection site. This condition usually appears within hours and decreases by 2 to 4 hours later. The main cause of pain in the injection area is the normal immune system reaction to the ery of vaccine aigens, which increases blood flow and local inflammation. To relieve this pain, you can use a cold compresses on the arm or mild muscle moveme. Simple painkillers such as acetaminophen also help relieve discomfort. This is a mild complication and is eliminated in most people without the need for specific action.
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Swelling and sensitivity in the arm
Some people may notice swelling, heavy or sensitivity to their arm after the vaccine is injected. This reaction is just like the previous one due to the activation of the immune system and will improve in a few days. Feeling discomfort. This one of the complications of the flu vaccine is likely to be even more likely by lifting objects or moving the arm; But this pain is not as much as you can’t do your daily routine. The use of cold compresses or simple ai -inflammatory drugs can reduce the iensity of inflation. If the symptom persists for more than a week or is accompanied by severe redness and secretion, your doctor should be referred for a topical infection.
Mild fever
Mild fever is another of the most common complications of the flu vaccine for children and adults, which usually occurs in the first 2 hours after injection. The body temperature stays between 1 and 2 degrees and indicates the body’s efforts to build aibodies. This fever is often resolved within 1 to 2 days and has no worries. Drinking enough liquids such as demos for the flu, resting and using simple fever medications can help corol this condition. High fever, above 2 degrees or prolonged, especially in children and the elderly, requires a physician to examine the possibility of infection or abnormal reaction.
Headache
In addition to the complications we have said so far, headaches, fatigue, and muscle tiredness are other symptoms that people experience just after the flu vaccine injection. These symptoms are similar to what is seen at the beginning of a cold and arises due to the activation of the immune system and the release of inflammatory chemicals in the body. The pain and fatigue of the body are mild side effects that disappear within 2 to 3 days. Eating enough fluids, sleeping enough and using simple painkillers such as the best cold pills will help reduce this.
Iense allergic reaction
Sometimes a number of people may have an allergic reaction after receiving the flu vaccine. These reactions occur very quickly and only a few hours or hours after the injection. It is precisely why it is recommended that the person stay in the medical ceer for at least 1 to 2 minutes after the vaccine to take immediate action if the reaction occurs. If you see any allergic reaction, a person should see a physician very quickly. The warning signs they should be careful about are:
- Hives or rashes of extensive skin
- Swelling of the face, lips or tongue
- Feeling pressure or swelling in the throat
- Wheezing chest or problem of breathing
- Dizziness or severe weakness
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Gilan Bar Syndrome (GBS)
One of the rarest complications reported with the influenza vaccine is Gillen Barra’s syndrome. It is an autoimmune neurological disorder in which the immune system attacks the peripheral nerves and can cause weakness, numbness or even temporary paralysis. The probability of this complication is very low, and only a few cases per million doses of vaccine are seen. However, its importance is that it requires quick treatme and delay in referrals can cause serious complications. This means you shouldn’t wait to see the effects of the flu vaccine a few days later. Early symptoms include weakness in the legs, needlework, and difficulty walking. Although the definitive connection between the vaccine and Gilanbah has not yet been proven, awareness of it is importa for conscious decision making.
The complications of the flu vaccine in children
In order not to go for the fastest way to treat influenza in children, it is best to take the famous “Preveion of Treatme” proverb. This is especially importa for children who have a weaker immune system or attend populated environmes such as kindergarten and school. Of course, it is quite natural to worry about the effects of the flu vaccine and be afraid that your baby will experience them too. The good news is that most of these complications are mild, short -term and safe, but familiarity with them can reduce your anxiety and make your child’s care easier.
Fever and chills in children
One of the most common reactions in children after the flu vaccine is fever and chills. Children, especially at an early age, are more sensitive to immune changes, and their bodies sometimes respond to the vaccine with high fever. This fever is usually reduced within 1 to 2 hours; But in some cases it can reach 2 degrees. In such circumstances, pares should pay atteion to keeping the baby’s body cool, giving pley of fluids and rest. If the fever lasts more than three days or is accompanied by a seizure, immediate referral to the doctor is necessary.
Gastroiestinal symptoms
The fact is that most adults experience gastroiestinal complications caused by vaccine injections such as nausea, vomiting or diarrhea. This situation is not supposed to stay with your baby for a long time and disappear within a day or two. The cause of gastroiestinal problems is still not fully clear, but it seems that the sensitivity of the children’s digestive tract to immune changes in the body. Pares should be careful not to dehydrate during this time and see a doctor if symptoms persist or blood in the stool.
Abnormalities and behavioral changes
Many pares report that their child is restless, sleepy or maligna after vaccination. These reactions occur due to body fatigue when the immune system is activated. Repeated can last for several hours to a day and is often eliminated without the need for specific treatme. The best way to do this is to provide a relaxed environme, adequate sleep and embrace a child to create a sense of security.
Rare but importa reactions
Although most reactions in children are mild, pares still need to be alert to warning symptoms. The severe allergic reactions we meioned in the previous sections are very rare, but if each of them see each of them, the child must be immediately transferred to the emergency room. Also, if the child has abnormal muscle weakness, numbness or motor problems after vaccination, it must be examined immediately.
The complications of the flu vaccine in pregnancy
Pregnancy is a sensitive period in which many changes occur in the mother’s body. The immune system is slightly weakened during this period so that the body can maiain the fetus without a defensive reaction. This makes pregna women more likely to develop viral diseases such as influenza. For this reason, experts recommend that pregna women receive the flu vaccine in the fall and wier. In order to maiain the health of the mother and fetus at this time, you need to be familiar with the side effects of this vaccine. We examined these symptoms in previous sections; Below are the most importa things to consider.
- Mild fever is normal after the vaccine and indicates the activation of the immune system.
- Fever above 2 degrees or prolonging more than 2 hours requires medical follow -up.
- High fever during pregnancy can affect the placea’s blood flow and be dangerous to the fetus.
- Corol measures, including rest, consumption of sufficie fluids, and the use of prescription fever, are importa. Remember that a number of medications are completely forbidden during pregnancy.
- Some women experience the feeling of numbness, mood and mood change after the vaccine.
- These symptoms are due to the combination of normal pregnancy fatigue and the activation of the immune system.
- It is usually resolved within 1 to 2 days and does not require special treatme.
- It is recommended that mothers stay in the medical ceer for at least 5 minutes after the injection.
- In the eve of severe allergic symptoms, urge visits to the emergency departme are esseial.
Source: NHS
