Nut allergy can produce:

• A tingling feeling in the lips or mouth;
• An itchy nettlerash (urticaria, hives), either where the nuts touch you, or elsewhere
• swelling (angioedema), either where the nuts touch you, or elsewhere,
• swelling in the throat, causing difficulty in swallowing or breathing,
• Asthma symptoms,
• Vomiting,
• Cramping tummy pains,  
• Diarrhea,
• Faintness and unconsciousness,
• Death due to obstruction to breathing or more rarely, extreme low blood pressure (anaphylactic shock)