Comedian Steve Carell has to undergo regular pain injections in his hip to treat an old ice hockey injury.

The Crazy, Stupid, Love star has been treating the ailment with twice-yearly medical shots ever since high school, and the 50 year old fears he will eventually need to have hip replacement surgery.

He tells U.S. talk show host David Letterman, "My hip is not so good. I was a goalie in hockey and apparently goalies are prone to these specific hip injuries, so I had to have these injections. It's called orthovisc because it (the hip bone) just grinds against each other (sic)... I think I will (have to have it replaced)."

In the meantime, Carell has to endure uncomfortable trips to the doctor's office every six months.

He explains, "They go through your groin with a needle... and you can look at it on an X-ray where you can watch the needle going in and searching around (for the joint), and the last time I went in, the doctor couldn't find it for 15 or 20 minutes... And you're just writhing around. It's kind of a sickening kind of pain."