Yes, caffeine can cause nervousness. In fact, too much caffeine can lead to anxiety and physical symptoms. When you take more than 250mg of caffeine per day, and you take it every day, then it can lead to caffeinism, which is characterized by nervousness, anxiety, irritability, tremulousness, restlessness, rapid breathing, muscle twitching, flushing, palpitation, gastrointestinal disturbances, and problems with […]