Common signs of food intolerance include gastrointestinal issues such as bloating, gas, and diarrhea after consuming certain foods. Other symptoms may include fatigue, headaches, and skin problems like rashes or acne. Food intolerance often involves difficulties digesting particular components, such as lactose or gluten, leading to discomfort. Unlike food allergies, intolerances typically do not trigger severe reactions but can significantly impact daily life. Identifying and managing intolerances can lead to improved health and well-being.