This is Dr. David
I am a cancer doctor
this may not be a swollen lymph node
you could have a blocked submandibular gland, like from a salivary duct stone which can cause it to swell up and be sore.
an ultrasound or doctor's exam can tell if your submandibular gland is swollen or not .
for a swollen salivary gland, warm compresses and sucking on lemon drops can help dislodge a stone which is blocking the salivary gland.
let me know if you have other questions.
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