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Swollen lymph nodes can be caused by:
Common illnesses such as a cold or an ear infection
Bacterial infections such as strep throat
Viral infections such as mononucleosis
Certain rare illnesses that affect the immune system
The doctor asks about your child’s symptoms and health history.
A physical exam is performed on your child. The doctor will check the nodes in the neck, behind the ears, under the arms, and in the groin. These nodes can often be felt from outside the body when they are swollen. If an infection is suspected, the doctor may order more tests as needed.
Medication can be prescribed by the doctor to treat an infection. Your child should take ALL of the medication, even if he or she starts feeling better.
If lymph nodes are painful or tender, do the following at home to relieve your child’s symptoms:
Give your child over-the-counter medication, such as ibuprofen or acetaminophen, to treat pain and fever. Do not give ibuprofen to an infant 6 months of age or less, or to a child who is dehydrated or constantly vomiting. Do not give aspirin to a child with a fever. This can put your child at risk of a serious illness called Reye’s syndrome.
Apply a warm compress to any painful or tender lymph nodes. Use an item such as a warm, clean washcloth. A bottle filled with warm water, or a potato warmed in a microwave and wrapped in a towel, can also be used as a compress.
In an infant under 3 months old, a rectal temperature of 100.4°F (38.0°C) or higher
In a child 3 to 36 months, a rectal temperature of 102°F (39.0°C) or higher
In a child of any age who has a temperature of 103°F (39.4°C) or higher
A fever that lasts more than 24-hours in a child under 2 years old, or for 3 days in a child 2 years or older
Your child has had a seizure caused by the fever
Painful or tender swollen lymph nodes that don’t go away within 2 weeks
Painful or tender swollen lymph nodes that continue to grow in size