The flu vaccine is generally well tolerated and the most common side effects, such as fever, headache and muscle pain, sweating and injection site reactions, are generally mild and transient and are not cause for concern.
However, severe allergic reactions or neurological changes, for example, although very rare, are a concern and require urgent medical attention.
The most common reactions the flu vaccine can cause are
Some people may experience fatigue, headaches and headaches, which may appear 6 to 12 hours after vaccination.
What to do: If you have these symptoms, if possible, you should rest and drink plenty of fluids; If the pain is severe, pain relievers, such as acetaminophen or dipirony, may be taken, for example.
Some people may experience fever, chills and sweat more than usual, but these are usually transient symptoms, which appear 6 to 12 hours after vaccination and go away in about 2 days.
What to do: To alleviate these symptoms, if this causes a lot of discomfort, the person can take pain relievers and antipyretics, such as paracetamol or dipyrone, for example.
One of the most common side effects that can occur when the flu vaccine is given are reactions at the vaccine site, such as pain, erythema and injection site induration.
What to do: To relieve pain, erythema and inflammation, ice should be applied to the area.If there are serious injuries or limited movement, seek medical attention immediately.
Although this is very rare, in some cases the following side effects may occur:
Anaphylaxis is a very severe allergic reaction that, although rare, can occur in some people who receive the vaccine.Characteristic symptoms of a severe allergic reaction include low blood pressure, shock and Quincke’s edema.
What to do: In the face of these symptoms, you should make an emergency visit to the medical emergency room to know what to do in case of anaphylactic shock.
Neurological disorders such as encephalomyelitis, neuritis and Guillain-Barré syndrome are reactions that, although rare, are very serious, discovers what Guillain-Barré syndrome is all about.
What to do: These situations require urgent medical assistance, so if the person suspects they have a neurological disorder they should see the doctor as soon as possible.
Another side effect that can occur is a change in the blood or lymphatic system, such as a reduction in the number of platelets and inflammation of the lymph nodes, which are usually transient symptoms.
What to do: These symptoms usually go away within a few days, otherwise you should see your doctor.
Vascularitis is characterized by inflammation of blood vessels, including those in the kidneys, lungs and heart, which affects the functioning of these organs.Symptoms of vascularitis can vary by type and severity, but often cause discomfort, fatigue, fever, loss of appetite and weight loss.
What to do: If the vasculitis symptoms mentioned above occur, you should consult a doctor immediately.