Burning the candle at both ends
To work excessively hard, leading to stress and fatigue.

At the end of one's rope
To be out of patience or options, feeling overwhelmed.

Under pressure
Experiencing stress due to demanding circumstances.

A bundle of nerves
Someone who is very anxious or stressed.

On edge
Feeling nervous or tense.

The straw that broke the camel's back
A small problem that causes a larger breakdown due to accumulated stress.

Can't see the forest for the trees
Being so focused on the details that you miss the bigger picture, causing stress.

In over one's head
To be involved in a situation that is too difficult to handle.

Tension headache
A type of headache caused by stress.

Caught in a vice
Feeling trapped or pressured by conflicting demands.

Hitting a wall
Reaching a point of exhaustion or inability to continue.

Running on empty
Operating with little energy or motivation due to stress.

Wound up
Extremely anxious or stressed out.

Bite off more than one can chew
Taking on more responsibilities than one can manage.

In a bind
In a difficult situation with limited options.

Freaking out
Losing control due to stress or panic.

A pressure cooker
A situation that is tense and likely to explode.

Stress test
A method to assess how much stress a person or system can handle.

Drowning in stress
Overwhelmed by stress or problems.

Take it easy
To relax and not stress about things.