Cahill was diagnosed with a blood clot on his arm last month and was expected to miss the rest of the season, but now the defender hopes that he can still resurrect his England dream.
“Catching the problem saved me months of treatment,” he told the News of the World.
“I obviously wasn’t fit to play against Egypt and that was a disappointment. But I can’t do anything about it now.
“It’s all about getting fit and concentrating on my form for Bolton.
“If I can get back playing and pick up where I left off then you never know what might happen with England.”
“On the Saturday when I got out of shower before heading to the Reebok, I knew something wasn’t right,” he said.
“I came in a bit earlier than normal and because there was so much discolouring in my hand and swelling in my arm, the doctor sent me to the hospital straight away.
“I looked massive on one arm and not on the other.
“They put a tube in my arm and fed it up the vein and for 24 hours they pumped a fluid into the clot which dissolved it.
“The next day I had a special balloon put into my arm which swelled the vein so they could clean it out.”
He added: “My collar-bone and rib were too close together which meant every time I lifted my arm up in the air my vein was getting trapped.
“It is similar to when a hose pipe gets a kink. That will have happened every single time and it was eventually one too many which caused the clot.
“In a way it was destined to happen. If it didn’t now it would have somewhere along the line, so in that respect it has been good to get it dealt with.”