I am16yearsoldand I have a yellow stool for aboutamonth now I am worried that I have cancer. What is the most likely cause. My momthinks imahypochon?

Listen to mom. The amount, color, frequency of stool varies with foods, speed of emptying of the GI tract, medications & supplements ingested, gut flora (unique for each individual), additives (like blood), subtractions (like absent bile), infection, inflammation, & other factors. If stool pattern has changed, is unusual for you, & the change persists, or is accompanied by other symptoms, see your doctor.