What symptom is commonly associated with caffeine intoxication?

Caffeine intoxication is commonly characterized by a range of symptoms resulting from the stimulant effects of caffeine on the central nervous system. A flushed face is a physical manifestation that can occur in response to increased heart rate and elevated blood pressure, both of which can be stimulated by high doses of caffeine. However, it is essential to note that while flushing can occur occasionally, it may not be the most common presentation of caffeine intoxication.

Instead, one of the more definitive symptoms of caffeine intoxication is insomnia, which reflects the impact of caffeine on sleep patterns and an increased level of arousal. Caffeine can disrupt normal sleep cycles, leading to difficulty in falling asleep or staying asleep. The stimulant properties of caffeine result in individuals feeling more alert and awake, which may interfere with their natural sleep-wake rhythm.

Other common symptoms of caffeine intoxication include increased energy, restlessness, nervousness, and gastrointestinal disturbances. Overall, while a flushed face can occur, insomnia is a hallmark symptom closely associated with caffeine intoxication that signifies the disruptive influence of caffeine on sleep.