I do have a similar lymph node under my left jaw as well, but it seems slightly smaller. they move easily and seem almost slippery -maybe the size of a lima bean or larger-its hard to tell really. does anyone else get this? I clench my jaw alot, and I have TMJ, but I dont know if that would cause the submandibular lymph node to swell. Please let me know if youve ever had this, or worried about lymph nodes like this. im scared its lymphoma HIV, or some other metastatic cancer.