Sudden lymph gland growh (near jaw). it grown and aches in 30minutes. what it may be?

Inflammation/Infecti: You certainly have inflammation and this usually means infection. The lymph nodes (glands) are filters of the blood system. If you have had an inflamed lesion on the scalp, up over, behind, in front of or under the ear, on the neck or the face recently, then this would explain this. Bites can do this (ticks, chiggers, etc ). If this is hot or red and tender and if fever, get urgent check up!

Salivary gland stone: May not be lymph gland. May be salivary gland. Sudden swelling and pain or discomfort can be due to a stone stuck in salivary gland. Lymph nodes don't usually get big suddenly. Got fever? Is it warm? Dental problems? Any other swellings?Check with doc. Rx often with fluids, sour stuff (stimulate saliva production), warm compresses; sometimes antibiotics if evidence of infection. See your doc.