There is a wide range of severity when it comes to symptoms of food allergies. An initial reaction that causes few problems does not mean that future reactions will be the same. For example, a food that causes mild symptoms on one occasion might trigger more severe symptoms on another. Most food-related symptoms begin within two hours of consumption; often they begin within minutes of ingestion. The reaction can be delayed by four to six hours or even longer in very rare cases. Children with food allergies, such as eczema, and people with tick-induced red meat allergies are most likely to develop delayed reactions.