Onion is a spicy food. Onion is a very nutritious food, not only rich in protein, carbohydrates, etc., but also contains potassium, vitamin C, carotene, niacin, calcium, zinc, selenium, potassium and other nutrients. In addition to this, onions also contain chorine and volatile oils with a pungent aroma, and in the process of cutting onions, the epidermal volatile oils can lead to tears in the eyes. Chorine is also the main reason for the pungent flavor, so onions are spicy food. Although onions are nutritious, they are a spicy food, so it is not recommended to consume a large amount at once to avoid acid reflux, stomach pain, bloating and other discomforts. Onions have a certain nutritional value, but should be consumed in moderation, and can not replace the efficacy of drugs, the emergence of uncomfortable symptoms, please consult a doctor in a timely manner.