过敏症状
食物过敏是最有可能引起恶心和/或呕吐的过敏。当你的反应发生时The immune system is a collection of cells and proteins that works to protect the body from potentially harmful, infectious microorganisms (microscopic life-forms), such as bacteria, viruses and fungi. The immune system plays a role in the control of cancer and other diseases, but also is the culprit in the phenomena of allergies, hypersensitivity and the rejection of transplanted organs, tissues and medical implants." rel="tooltip">免疫系统对食物或食物中的物质反应过度，错误地将其视为危险并触发保护性反应。
你通常不会把季节性过敏和恶心联系起来——这是有充分理由的。恶心和呕吐很少，如果有的话，是季节性疾病的症状Allergies are inappropriate or exaggerated reactions of the immune system to substances that, in the majority of people, cause no symptoms. Symptoms of the allergic diseases may be caused by exposure of the skin to a chemical, of the respiratory system to particles of dust or pollen (or other substances), or of the stomach and intestines to a particular food." rel="tooltip">过敏．典型的季节性过敏症状包括打喷嚏、流鼻涕、眼睛发痒，可能还有皮疹。
如果你遇到你过敏的东西，你的免疫系统认为这种物质是危险的，并释放一种叫做Histamine is a chemical present in cells throughout the body that is released during an allergic reaction. Histamine is one of the substances responsible for the symptoms of inflammation and is the major reason for a nose running, sneezing, and itching in allergic rhinitis. It also stimulates acid production by the stomach and narrows the bronchi or airways in the lungs." rel="tooltip">组胺来抵消它。组胺可引起多种症状，包括皮疹、头痛、打喷嚏、流鼻涕和肿胀，以及食物过敏、恶心、呕吐和腹泻。如果过敏原是你吸入的东西，你的反应可能会影响你的眼睛、鼻子和肺。如果你吃了过敏原，你更有可能在口腔、胃和肠道出现症状。
其他食物过敏症状包括：
- 荨麻疹
- 气短
- 喘息
- 反复咳嗽
- 循环系统的休克或崩溃
- 紧,嘶哑的喉咙;吞咽困难
- 舌头肿胀，影响说话或呼吸的能力
- 弱脉
- 苍白或蓝色皮肤
- 头晕
最严重的反应称为速发型过敏反应，可能会危及生命，需要立即进行治疗Epinephrine is a naturally occurring hormone, also called adrenaline. It is one of two chemicals (the other is norepinephrine) released by the adrenal gland. Epinephrine increases the speed and force of heart beats and thereby the work that can be done by the heart. It dilates the airways to improve breathing and narrows blood vessels in the skin and intestine so that an increased flow of blood reaches the muscles and allows them to cope with the demands of exercise. Epinephrine has been produced synthetically as a drug since 1900. It remains the drug of choice for treatment of anaphylaxis." rel="tooltip">肾上腺素自动注射器，然后进行紧急治疗。
向过敏专家寻求专业护理。
不要让过敏或过敏Asthma is a chronic, inflammatory lung disease characterized by recurrent breathing problems. People with asthma have acute episodes where the air passages in their lungs get narrower, and breathing becomes more difficult. Sometimes episodes of asthma are triggered by allergens, although infection, exercise, cold air and other factors are also important triggers." rel="tooltip">哮喘拖你后腿。
触发
如果你对食物过敏，可能导致恶心和呕吐等症状，了解哪些食物会引发你的症状是很重要的。
八种最常见的食物过敏原是：
如何进行测试
如果你认为你可能对食物过敏，导致恶心和呕吐，你应该接受过敏专家的检查。由委员会认证的过敏症专家进行测试是帮助您处理过敏症并避免触发过敏的第一步。过敏症医生会详细记录你的病史并检查你的症状，以确定你的症状是否是由食物、药物、昆虫叮咬或其他过敏引起的。
过敏测试既方便又准确。当结合详细的病史时，过敏测试可以确定引发过敏反应的具体因素。测试还可以帮助你的过敏症医生确定你是否有食物不耐症或食物过敏，这两者都会导致胃部不适。
许多人可能认为他们有食物过敏，但他们真正经历的是食物不耐受。食物不耐受通常与食物过敏相似，会引起恶心和呕吐，但不会危及生命。确定你是否正在经历食物过敏的最好方法是去看过敏症专科医生做测试。过敏症专科医生会帮助你制定一个行动计划来处理你可能有的任何过敏或不耐受。
也可能是…
有很多东西会引起恶心和呕吐。如果你的过敏症医生排除了严重的过敏症，那么问问还有什么可能导致你恶心，例如：
- 脑震荡或脑损伤
- 妊娠早期
- 饮食失调
- 情绪压力
- 食物中毒
- 心脏病
- 感染，如胃流感
- 剧痛
- 晕动病
- 对药物的反应
- 对某些气味或气味的反应
- 溃疡
