Her father, a doctor, thinks it's plantar fasciitis.
The 2008 World Junior Champion in the 1500m is upbeat about her prospects in 2012.
She is injured and will probably miss the World Championships, too.
Keeping the same routine may be more important.
It took paramedics 20 minutes to arrive at the race's finish line.
Prosthetic limbs have come a long way in recent years allowing more and more injured athletes to keep running.