Memory Hack Read our articles to know more about health and nutrition, benefits of adequate hydration and low calorie diets to have a better life today and tomorrow. All fried, greasy and stale foods must be avoided as these foods are not easy to digest and thereby cause blockage in the respiratory channel and difficulty in breathing. Many people prefer to wear light cotton surf clothes as it keeps them cool by evaporating the body heat. If one is not getting enough sodium from the diet, symptoms of a keto-flu may appear. Symptoms of a "keto-flu", such as feeling light-headed, dizziness, headaches, fatigue, brain fog, and constipation.