L04.9: Acute lymphadenitis, unspecified
The lymph nodes are small bean-shaped objects. They are found throughout the body. Lymph nodes filter the tissue fluid. They are part of the defense system. Our lymph nodes contain certain immune cells. The immune cells can identify and attack pathogens or changed body cells, for example.
A lymph node gets inflamed when, for example, the body has been infected by pathogens. If immune cells in the lymph node work harder than usual due to an inflammation, the affected lymph nodes swell up.
Lymph nodes in certain places in your body are swollen. Applying pressure on the affected site is usually painful. The affected site may also appear red. Pus may also have collected there.
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If you see an ICD diagnosis code (e.g., on a medical report), be aware that doctors may also include additional indicators to express diagnostic certainty. Only a healthcare professional can interpret these codes accurately in the context of your individual case.
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