Yes, tooth decay can cause the swelling of the lymphnodes on the jaw line , and under the jaw. Oral thrush does not make lymphnodes swell. Causes of the oral thrush are: using corticosteroid drugs and immunosuppressants, diabetes, stress, HIV infection, use of antibiotic. Your health care provider can prescribe Mycostatin suspension to you for oral thrush. The swelling of the lymphnodes probably will disappear after treatment of your teeth for teeth decay.
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