It is important to remember that green peas are not a vegetable, like many people think. They are a legume and legumes can be a common allergen. Precautions should be taken if you have any other legume allergies and always consult a professional first.  The signs of an allergy normally develop within seconds of consuming the food and includes tingling of the mouth or tongue, swelling of the face, eyes or throat, and wheezing. If these symptoms develop, you must seek medical help immediately.