Medically reviewed by Jurairat J. Molina, MD Key Takeaways Food allergy symptoms can start quickly after eating and may last from minutes to a couple of days.Seasonal allergy symptoms can last for ...

When you have a food allergy, your reaction can start within minutes of eating the trigger food. In some cases, it might take up to 2 hours. The length of the reaction depends on the severity of your ...

The average reaction time is three-quarters of a second. Reaction time is how long it takes to move your foot from the accelerator pedal to the brake pedal in response to a situation. Reaction times ...