The clavicular lymph nodes include the supraclavicular and subclavicular lymph nodes. The supraclavicular lymph nodes are located between the clavicle and the sternocleidomastoid muscle, near the subclavian artery and brachial plexus, and along the transverse cervical vessels. The subclavian lymph nodes are located below the clavicle, in the sulcus between the deltoid and pectoralis major muscles, along the cephalic vein. The left supraclavicular lymph node receives lymphatic fluid from the esophagus, stomach, and other organs, while the right supraclavicular lymph node receives lymphatic fluid from the trachea, lungs, and pleura. The subclavian lymph nodes, also known as the deltoid pectoral lymph nodes, receive superficial lymphatic vessels traveling up the cephalic vein and a few injections into the supraclavicular lymph nodes. If the clavicular lymph nodes appear enlarged, you should go to a regular hospital in time, and give targeted treatment after the doctor clarifies the cause of the disease.