Callum had bubbles in his urine. Doctors told him not to worry... now he's on a transplant waiting list after being diagnosed with a disease that affects millions. Here are all the vital signs you can't ignore ⊕

As a seemingly fit young man, Callum Renton initially presumed the throbbing back pain that hit him out of the blue was due to a muscle strain. It took ten months to get an accurate diagnosis.