Expressing concern:
* Don't worry, be happy: A popular phrase encouraging calmness and optimism.
* Don't worry about it: Used to reassure someone that everything will be alright.
* Worrywart: A person who worries excessively.
* Worry lines: Lines on the face caused by worry.
* To worry about something: To feel anxious or concerned about something.
* To worry someone: To cause someone to feel anxious or concerned.
Expressing lack of concern:
* Not to worry: Used to reassure someone that there is no need to worry.
* No need to worry: Similar to "not to worry," but with a more direct tone.
* Don't worry, I've got this: Used to express confidence and reassure someone that you're handling a situation.
Other common phrases:
* To worry someone sick: To cause someone to become ill due to worry.
* To have a worry on your mind: To be preoccupied with a concern.
* To throw a worry onto someone: To make someone else responsible for a concern.
* To have a worrying thought: To have a thought that makes you feel anxious or concerned.
Figurative use:
* Worry beads: A string of beads used for prayer or meditation, sometimes associated with worry.
* To worry a bone: To chew on something, often a bone, out of anxiety or boredom.
Idioms:
* Worry the life out of someone: To constantly worry about someone or something.
* To worry one's head off: To worry excessively.
* To worry a problem to death: To overthink a problem to the point of making it worse.
These are just a few examples, and the specific phrases you use will depend on the context.