Depending on the individual and their ability to digest food, there will be differences in the time it takes. Food intolerance usually takes about 12 hours to resolve. People with severe intolerance will experience relief in about three days. When food intolerance occurs, it is recommended to go to the hospital for treatment. People with food intolerance may experience abdominal pain, vomiting, diarrhea and other symptoms. In severe cases, people may even experience fever and difficulty in breathing, which may even be life-threatening. Food intolerance is an immune system disorder in which the body perceives the intolerant food as a harmful substance, attacks it, and overreacts. It is recommended to go to the hospital for examination to clarify which foods are intolerant and to treat the cause. Try to avoid intolerant foods in your daily life.