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  Blood Sugar Spikes: Causes, Risks, and Practical Solutions Why Blood Sugar Spikes Are Getting So Much Attention Over the past few years, more people have started tracking their glucose levels with continuous glucose monitors (CGMs), and the term "blood sugar spike" has become part of everyday health conversation—even among people who don't have diabetes. A blood sugar spike refers to a rapid rise in blood glucose after eating, followed by an equally sharp drop. While this used to be a concern mostly for people managing diabetes, research and personal data from wearable devices have shown that frequent spikes can affect anyone, often showing up as fatigue, brain fog, sudden hunger, and difficulty maintaining a healthy weight. What Causes Blood Sugar Spikes The most common trigger for a blood sugar spike is eating refined carbohydrates or sugary foods quickly, especially on an empty stomach. White rice, white bread, pastries, candy, and sugary drinks are digested and ...