As exam season hits, students across South Africa are feeling the pressure — long hours, sleepless nights, and endless cups of coffee. But behind the hustle, exam stress can seriously affect both mental and physical health.Tania Joffe, Founder of Unu Health, reminds students that exams test more than knowledge — they test resilience, sleep, nutrition, and stress management. Chronic stress can raise cortisol levels, leading to headaches, anxiety, fatigue, and weakened immunity.