You may have difficulty concentrating and feel unable to work.

She had difficulty concentrating and felt less aware of her surroundings.

"They had difficulty concentrating and were distracted by the second objects."

Perform poorly at school or work and have difficulty concentrating.

"I'm trying not to let it affect me," she said, "but obviously at certain times I have difficulty concentrating out there."

Such children are impulsive and have difficulty concentrating on a task for more than a few minutes or even seconds.

I try to listen to their explanation of what will be done to me, but I have difficulty concentrating.

These children are exposed to dietary deficiencies and have difficulty concentrating at school.

They may relieve symptoms such as fatigue, sleep problems, difficulty concentrating, and pain.

In severe cases, however, tinnitus can cause people to have difficulty concentrating and sleeping.