Swollen lymph nodes can occur because of an infection, or they can be a sign of a more serious illness. If you feel an enlarged lymph node or you’re unsure, let your doctor know right away. Then check the vertical chain of lymph nodes along the inner upper thigh on both legs. To check the lymph nodes in your groin, use your fingers to feel the horizontal chain of lymph nodes along the groin crease on each side. Check the front and back borders of your armpit as well the inner border of your arm. Use the fingers on your opposite hand to feel the center of your armpit. To check the lymph nodes in your arms and armpits, remove your shirt and lift up one arm. Bring your elbows forward and hunch your shoulders when checking the lymph nodes above your collar bone. Tilt your head toward the side of your neck you’re checking to make it easier to feel for lymph nodes. To check the lymph nodes in your head and neck, move your fingertips in a circular motion in front of and behind your ears, around your jaw, down the sides of your neck, and above your collar bone. An enlarged lymph node may feel like a pea or a grape, and it may feel tender. Examples include lung infection, lung cancer, lymphoma in the chest cavity, or breast cancer. These generally suggest cancer or an infection in the region close by. Lymph nodes are located in your head, neck, arms, armpits, and groin. Enlarged lymph nodes above the collarbone: Enlarged lymph nodes above the collarbone (supraclavicular lymphadenopathy) are always considered abnormal. You may want to check your lymph nodes once a month.Checking your lymph nodes once a month can help you detect any swelling that could indicate a medical issue. Visit your doctor as soon as possible if you ever suspect one of your lymph nodes has become swollen or if you notice any lumps or bumps on your body. For example, they may be a symptom of cancer, HIV, or tuberculosis. Swollen lymph nodes can sometimes be a sign of something less common. You should not normally be able to feel them. Healthy lymph nodes are typically pea-sized. Common Objects for Guessing Lymph Node Size The most common causes of swollen lymph nodes are upper respiratory infections (URI) and infections near lymph nodes in parts of the body. Lymph nodes can become swollen for several reasons. Swollen nodes with a viral infection are usually 1/2 to 1 inch (12 -25 mm) across, and nodes with bacterial infections are usually over 1 inch (25 mm), which is about a quarter size. They also feel soft and are easy to move. Normal lymph nodes are generally less than 1/2 inch (12 mm) across. Usually, they are the same size on both sides of the body. Normal lymph nodes are found in the neck, armpit, and groin. The shape index is a good indicator for distinguishing benign and malignant lymph nodes, but it is not always accurate. Some scholars have proposed a "shape index" to describe the shape of lymph nodes, that is, the ratio of the short axis to the long axis of the lymph node. Malignant lymph nodes lose their normal shape and are often round. Reactive hyperplastic lymph nodes have diffuse hyperplasia and cortical widening but maintain normal morphology. Normal lymph nodes are oval or kidney-shaped. There is no uniform standard for the threshold for differentiating benign and malignant lymph nodes. The size of cervical lymph nodes varies by location and gender, and lymph nodes in the upper neck, including the submandibular and level II, are larger than other locations. Under normal physiological conditions, lymph nodes maintain a relatively stable size and structure however, under pathological conditions (e.g., infection, inflammation, and tumor). They are also one of the main ways of tumor metastasis.Īlthough lymph nodes are inherently developed, their morphology and structure are highly plastic. They are important places for monitoring abnormal changes in the body, such as pathogen invasion, filtering and removing pathogenic microorganisms, and inducing antigen-specific immune responses. Lymph nodes are one of the main lymphoid organs in the body and are located almost everywhere. There are about 800 lymph nodes in the human body, like large and small safety fortresses. Externally, it resists the invasion of viruses and bacteria internally, it monitors the canceration of cells in the body. Specifically, it is responsible for two tasks. Lymphocytes are the smallest white blood cells in the human body.
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