What are lymph nodes?

Key ‘check-points’ in the lymphatic system, also known as lymph glands. They are small structures, located all over your body. You might be able to feel some of the lymph nodes that are closer to the surface of your skin, like in your neck. They trap germs and use their stores of infection-fighting lymphocytes to get rid of these cells and trigger the rest of the immune system into action. This is why when you are ill, you find your lymph nodes swell. Some people affected by WM might find that their lymph nodes swell even when they aren’t ill. This is because the abnormal B-cells produced by the body start to gather in the lymph nodes, causing them to react and swell.