Classification methods. Vehicles can be categorized in numerous ways. For example, by means of the body style and the level of commonality in vehicle construction as defined by number of doors and roof treatment (e.g., sedan, convertible, fastback, hatchback) and number of seats that require seat belts to meet safety regulations.
Keeping a diary of food consumed, physical and mental feelings each day, and physical activity will aid in discovering specific reasons for allergic reactions. Caffeine allergy symptoms can be as subtle as tingling in the mouth, itchy skin, and minor swelling of the throat. People who have these reactions every day may not even notice them. Many alternatives are available to replace caffeinated beverages and foods.
Curbing your caffeine habit. Whether it's for one of the reasons above â or because you want to trim your spending on coffee drinks â cutting back on caffeine can be challenging. An abrupt decrease in caffeine may cause withdrawal symptoms, such as headaches, fatigue, irritability and nervousness. Fortunately, these symptoms are usually mild and resolve after a few days. To change your caffeine habit more gradually, try these tips: 1  Keep tabs.