Derrick Rose (at right) can only watch the final minutes of the Chicago Bulls’ loss Sunday in Boston with Omer Asik (left) and Taj Gibson. (JESSICA RINALDI / Reuters)

“It's been hurting the whole trip,” the Chicago Bulls’ point guard said (via the Chicago Tribune) Sunday. “I just played through it. It tended to get worse after every game. I was really worried about it. But I'm trying to stay positive. I don't know what the diagnosis is. I just know my back is not right.”

Rose, walking like a 23-year-old Fred Sanford, missed his second straight game Sunday, a 95-91 loss to the Boston Celtics, as the team wrapped up a nine-game road trip. The Bulls start a six-game homestand Tuesday against Sacramento.

“It just came from out of nowhere,” Rose said. “That's the scary thing about it. ... I could barely walk [after playing 22 minutes in New Orleans]. It's killing me not being able to play, especially this game, or when I do play my minutes are definitely down. Hopefully, I'll get treatments and it calms down. If not, I'll take my time.”

Earlier in this compressed NBA season, Rose missed five games with a sprained left toe.

“Nobody can tell me how I feel but myself,” Rose said. “If I feel good, I'm going to try to go.”