While responding to a question on the humanitarian crisis in Syria, the President broke off in the middle of a sentence.
"What's going on? Somebody's not feeling good?" Obama asked. "We can get our doctors back there to help out."
He resumed his response, but broke off again.
"We need to get a doctor in here, I think," a reporter said. "Can that be arranged?"
"Can somebody help out, please, and get Dr. Jackson in here?" Obama asked. "In the meantime, just give her a little room."
A few minutes later, the doctor apparently arrived.
"There he is," the President said. "Okay. Doctor's in the house."
The stricken reporter was a 66-year-old woman who fainted twice in the packed briefing room and was being treated by Obama's physician, MSNBC's Chris Jansing reported.
This post has been updated.