Why do my eyes feel like I have to blink hard?

It usually happens when I'm out and anxious because I have anxiety.. say I'm sitting in a barber shop waiting.. when I blink, I feel like I need to blink hard and a lot. . or blink and stay for a few seconds... itsdk don't know what's going on.. its like I'm not comfortable at opening my eyes
Why do my eyes feel like I have to blink hard?
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