A worrying health trend is emerging worldwide — colorectal cancer is now becoming one of the leading causes of cancer-related deaths among younger adults, according to recent health data. Traditionally seen as a disease affecting older people, doctors are now seeing a sharp rise in cases among people in their 20s, 30s, and early 40s. Experts say changing lifestyles, poor diet, lack of physical activity, rising obesity, and delayed diagnosis are key reasons behind this surge.