The green tea is essential for me.
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I heard caffeine is bad for canker sore, I tried to keep off the green tea which is my favorite drink. Before I heard it, I drink cup of it every one hour during I get up at least, but I decreased the frequency, every a few hour. Thus, I left something to be desired. Am I caffeine addict, though I don't like coffee?

Green tea is essential for me.
I heard caffeine is bad for canker sores, so I tried to keep off the green tea which is my favorite drink.
Before I heard that, I drank a cup of it every hour when I was awake, at least, but I decreased the frequency to once every few hours.
Thank you for your nice corrections!