You may develop an allergy to certain substances, like say cucumber which is why you need to get yourself tested at the earliest to avoid developing severe allergic reactions to the allergen in question. Your current allergy could have developed recently or been there since you were young; but it is essential that you get yourself tested by a physician at the earliest, especially if you start displaying some of the symptoms listed below, on consuming cucumber.
Severe rash Inflammation of the lips Itching sensation in the mouth Difficulty breathing Difficulty swallowing Anaphylaxis You need to consult your doctor right away especially if you start displaying signs of developing anaphylaxis, which is a severe allergic reaction to the allergen in question. You need to head over to the emergency room right away.