Lymph nodes are usually found in many places on the body. Lymph nodes in the head and face are found around the ear, such as in front of the ear, behind the ear and under the ear, and in the jaw. In the case of acute or chronic pharyngitis or tonsillitis, there are usually enlarged lymph nodes in the jaw. The lymph nodes in the neck are usually located on both sides of the front of the neck, on both sides of the trachea and the thyroid gland. Lymph nodes in the thorax are usually found in the abdomen, bilaterally in the supraclavicular fossa, axillary fossa, or elbow fossa. In the case of malignant tumors of the lung or malignant tumors of the breast, lymphatic metastases may occur, resulting in enlarged lymph nodes in the axilla or supraclavicular fossa. In addition, in the lower extremities, the most common lymph node is usually in the groin. If the soft tissues of the lower extremities are infected and septic, this can lead to enlargement of the inguinal lymph nodes.