inflammation of the lymph nodes can be caused by what
Lymphadenopathy Lymphadenopathy or adenopathy is disease of the lymph nodes, in which they are abnormal in size, number, or consistency.[1] Lymphadenopathy of an inflammatory type (the most common type) is lymphadenitis,[2] producing swollen or enlarged lymph nodes. In clinical practice, the distinction between lymphadenopathy and lymphadenitis is rarely made and the words are usually treated as synonymous. Inflammation of the lymphatic vessels is known as lymphangitis.[3] Infectious lymphadenitides affecting lymph nodes in the neck are often called scrofula.
Lymph node Lymph nodes are present throughout the body, are more concentrated near and within the trunk, and are divided in the study of anatomy into groups. Some lymph nodes can be felt when enlarged (and occasionally when not), such as the axillary lymph nodes under the arm, the cervical lymph nodes of the head and neck and the inguinal lymph nodes near the groin crease. Some lymph nodes can be seen, such as the tonsils. Most lymph nodes however lie within the trunk adjacent to other major structures in the body - such as the paraaortic lymph nodes and the tracheobronchial lymph nodes.