<s>[INST] I started out couple days ao with tenderness under left jaw.  Now it includes neck area and my stomach has been killing me. Could this just be allergies?  I have had allergies for years.  The past few weeks I have been cleaning out a classroom of dusty pages etc from ten years ago. [/INST] Hello, Welcome to Chat Doctor, As your having a history of exposure to the dust which is followed by symptoms of allergy in neck area and stomach. Exposure to irritants like dust definitely stimulate the release of histamine which will give rise to the symptoms of itching in the body. The dust apart from causing the allergic reaction it also stimulates upper respiratory tract infection. Avoiding the irritant like dust will protect from getting the allergic reactions. Thank you. </s>