The Arnie look-a-like, who will also be playing the former terminator star in an upcoming biopic, took to Instagram to share the news, posting documents from the hospital.
In his Instagram story, the 27-year-old underlined Deep Venous Thrombosis, This is a blood clot in one of the deep veins and It is life-threatening to let his followers know the seriousness of his condition.
When clots appear out of nowhere, it's usually a bad sign, especially when they form in the deep veins near your muscles. “When blood clots form in this deeper system, they can be painful and very dangerous,” says Dr Luis Navarro, founder of the Vein Treatment Centre in New York City.
RELATED: 6 Signs You Might Have A Blood Clot
This particular clot is called deep vein thrombosis (DVT). If your circulation is a blood highway, DVTs are roadblocks that cause traffic jams, preventing healthy blood flow. Unfortunately, DVT can travel to your lungs making things extremely complicated.This is a pulmonary embolism (PE), a clot that stops oxygen and blood travelling to vital organs.
We're not sure if this is the time for Calum go to his cure for everything: chocolate milk. The bodybuilder is yet to post an update - wishing him well!