Diagram of human lymph nodes (I did not make this)

 

Source: https://www.medicinenet.com/image-collection/lymph_nodes_picture/picture.htm

Source: https://meded.ucsd.edu/clinicalmed/head.html 

Source: https://www.epainassist.com/infections/how-do-i-treat-swollen-lymph-nodes-by-myself

https://www.britannica.com/science/lymphatic-system

Just in case