Don't sweat it

Meaning

A gentle way to tell someone to relax and stop stressing about a minor problem. It implies that the situation will resolve itself or is simply not worth the anxiety.

Casual, reassuring

Used in a sentence

• Don't sweat it if you forgot the napkins; we have plenty of paper towels.
• I know you messed up the report, but don't sweat it, the boss didn't even notice.
• Hey, don't sweat it, I am sure your car will start once the engine warms up.