Tree nuts are edible seeds from various trees, including almonds, walnuts, macadamias, pecans, cashews, and hazelnuts. While these differ from peanuts (which are legumes), a large percentage of those with tree nut allergies will find peanuts to cross-react, making them likely problematic as well. Varying by region, tree nut allergies affect approximately 1-3% of the global population, making them one of the most common and potentially severe food allergies worldwide. Symptoms range from mild skin reactions to life-threatening anaphylaxis, often occurring within minutes of exposure. Tree nut allergies are usually lifelong, with only a small percentage of individuals, approximately 1 in 10, eventually outgrowing the allergy. For those affected, strict avoidance of tree nuts and products that may have come into contact with them is crucial in managing the risk of reactions.