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Alcohol has a controversial link to causing a condition called Sialadenosis which causes the swollen parotid glands with/without pain. Once the gland enlargement has started the only proved treatment is surgery to remove the parotid gland to give you relief. There is some association between alcohol induced pain and swelling of lymph
nodes in patients with Hodgkin's lymphona. It would be wise to get it biopsied and tested first to rule out infection, benign or malignant cancers as well.