What is the cause of the lump on my child's arm after vaccination?

The physical health of children is very important, and parents need to pay more attention to it. Otherwise, it is easy to get infected, which will have a serious impact on the development of children. In order to prevent children from being infected with some harmful viruses, children need to be regularly injected with some vaccines to enhance their immunity. However, some children have lumps on their arms after vaccination. What's the matter? Let's take a look at the explanation below. I hope parents will pay attention to it.

Local reactions: usually occur about 24 hours after vaccination. Redness, swelling, heat, and pain may occur at the injection site. Severe reactions can cause inflammation of nearby lymph nodes and lymphangiitis. The range of swelling and nodules at the injection site is divided into mild, moderate and severe. A mild reaction is one with a diameter of less than 2.5-5 cm, while a reaction larger than 5 cm is a severe reaction that can last for hours or days. If the local redness and swelling are severe, you can apply hot compress (hot compress is strictly prohibited for redness and swelling after BCG vaccination). Once in the morning and once in the evening, each time for about 5 minutes. And you should change your underwear frequently to avoid infection after ulceration. If there is local infection, apply gentian violet solution.

Systemic reaction: The first symptom is fever, with mild fever ranging from 37 degrees Celsius to 37.5 degrees Celsius and moderate fever ranging from 37.6 degrees Celsius to 38.5 degrees Celsius. Temperatures above 39 degrees Celsius are considered severe. In addition, some children may experience symptoms such as headache, dizziness, general weakness, chills, nausea, vomiting, abdominal pain, and diarrhea. The above reactions generally subside within 24 hours. Rarely lasts more than 3 years. If the fever is severe, you can take antipyretics. Generally, other symptoms will disappear on their own once the body temperature returns to normal. If the high fever persists or there are other abnormalities, the patient should be sent to the hospital for diagnosis and treatment in time.

Strengthen care after vaccination:

(1) Get enough rest and avoid running or jumping too much.

(2) Keep the injection site clean and do not scratch it with your hands.

(3) Do not eat irritating foods, such as garlic, chili peppers, etc.

(4) Drink more water.

(5) Parents should observe their children’s reactions after vaccination at any time.

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