Detailed answer

Caffeine is considered a trigger for rosacea as it can cause vasodilation and increase blood flow to the skin, leading to flushing and aggravating redness. Additionally, caffeine can act as a diuretic and contribute to dehydration, which could further irritate the skin and make rosacea symptoms more pronounced. It is advisable for individuals with rosacea to limit or avoid caffeine intake, including coffee, tea, energy drinks, and some sodas, as part of their management strategy. However, the impact of caffeine can vary between individuals, so it's important to determine personal triggers through trial and observation.