Mickelson taking medicine for severe arthritis

World No. 2 Phil Mickelson has been diagnosed with a severe form of arthritis that recently left him unable to get out of bed.
The US Masters winner said doctors at the Mayo Clinic in Minnesota were treating him for psoriatic arthritis, which first flared up in the week before the US Open in June.
“I have this thing called psoriatic arthritis where your immune system attacks your joints and tendons and so forth,” said Mickelson.
“It is very treatable and the medicine I've been taking has been very helpful. I feel 90 per cent. About eight weeks ago, about five days before the US Open, I woke up and had some intense pain in some areas of my body, some joints and tendons. I couldn't walk.”
Mickelson shot 73 69 73 67 to finish 12th at six under par in the US PGA championship on Sunday.