That is the verdict of the Everton medical team as the Australian midfielder continues his recovery from the latest foot injury to sideline him.
Cahill fell awkwardly on his left foot during his return to Everton action earlier this month in the friendly clash with Werder Bremen at Goodison.
He could be ready to return to full training by the end of September according to head physio Mick Rathbone.
"It's not so bad, he's walking round with no symptoms at all now. It's so frustrating. We're looking for 6-12 weeks on that. I know Tim will be banging the door down to start running on it soon.
"Getting him back into training isn't so bad, getting him back running round isn't a problem, but getting him jumping like he does, and landing full force on the outside of his left foot like he did the other day, it's going to be a while before its going to be strong enough to be able to do that, but again the time goes by, he gets stronger everyday.
"Tim jumps very very high and unfortunately has a habit of landing on his left foot. So like at Sheff. United when he landed and overbalanced he cracked it. It was similar against Werder Bremen, albeit five months after and he trained every day for a month and played three games for OZ - everything was fine.
"But unfortunately with that kind of force going through it, it just caused a little injury to the site again. So while we're happy he'll soon be back training there is in our minds that he has to jump and land on that."