A food allergy (过敏) is a medical condition that occurs when the body’s protection system perceives certain foods as a threat and responds to them with an allergic reaction.

Symptoms (症状) of a food allergy

【小题1】 However, a severe reaction can take up to a few hours following exposure. Symptoms can range from mild to severe. And they may differ each time a specific allergen appears. Symptoms can include: a skin rash or hives, swelling of the face or lips, or feeling lightheaded or dizzy. 【小题2】 That can send the body into shock or make it difficult to breathe.

Judging a food allergy

Doctors consider a number of factors when investigating a food allergy. Those include both a patient’s symptoms and family history of allergies. A physical examination may be performed to rule out any other conditions. 【小题3】

Treating a food allergy

It may not be possible for a patient to completely avoid foods that induce (导致) an allergic reaction. For minor reactions, you can take some medicine. For severe reactions, however, turn to doctors for help.

【小题4】

The only sure way to prevent an allergic reaction to food is to carefully avoid the allergens. This can be a difficult process. That requires patients to carefully study food labels to ensure the food is safe for them. 【小题5】 So it’s necessary to inform family or friends of the food that can cause a food allergy.