Clemens left his last start with a stiff back, but the back did not bother him yesterday.

He hadn't slept well; the mattress had been too soft, and his back was bothering him.

Even if your back is bothering you, it is important to get at least a little exercise.

In the recent past, that has been a sign that his back is bothering him.

His lower back is bothering him on his follow through.

"You probably caught me on a day when my back was bothering me," he said.

"He looks like he's doing things better than when his back was bothering him."

"Laying in that hotel bed all day, my back has been bothering me," he said.

"My back is bothering me worse than ever" won't help your doctor.

Chronic if your back bothers you most of the time for longer than 3 months.