There can be all sorts of symptoms. Peanut allergies sometimes cause anaphylactic shock. Melon gives my husband a bellyache. Some allergies cause skin sensitivities and eczema. Chocolate and grape allergies can cause headaches. Sometimes people's tongues swell up. For a while I had an allergy that would cause my mouth to have an unpleasantly astringent feel. Food allergies can also cause behavioral problems, depression, or irritability.
Sometimes when i drink cold milk my lip sweels up and tingles and fels tender to touch and a little bumpy, i'm 25 and has never happened before 2 years ago, strangely this always happens when i kiss my cat too!? What could it be?