Peanut allergy currently affects around 2% of the population. It is the most common cause of fatal food related anaphylaxis. Most patients (80%) will have long-lived peanut allergy. Primary peanut allergy most commonly presents in the first 5 years of life after the first known exposure to peanut. Clinical features are those of an IgE-mediated reaction. All patients with a history suggestive of peanut allergy should be referred to an allergy clinic for comprehensive assessment and management.