Important part of your immune system.
Why do your lymph nodes swell?
First of all, what are the lymph nodes?
Lymph nodes are small glands throughout your body that transport nutrients and waste between body tissue and your bloodstream
Lymph nodes swell as a result of injuries, sickness (bacterial/viral infections) or tumors developing in/near a lymph node. Lymph nodes are filled with white blood cells called macrophages and lymphocytes. When you are ill, these cells get put into action to fight the disease, so they swell. As bacteria invades the nodes, they begin to feel hard, they inflame, and they may begin to hurt. It is easy to tell the problem based on what nodes are swollen.
For exmaple:
- Swollen nodes around the throat/underarms/groin: cold/flu
- Large, swollen nodes under the thorat and the jaw: mumps
- Glands above the collarbone: infection/tumour of lungs/breasts/neck/abdomen.
- Etc, etc.
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