Common challenges candidates face during UPSC preparation include managing stress, maintaining motivation, and overcoming self-doubt. The vastness of the syllabus can be overwhelming, leading to procrastination and burnout. Time management becomes crucial, with many struggling to allocate sufficient time for each subject efficiently. Additionally, the competitive environment can lead to comparisons, affecting self-confidence. It’s important for candidates to develop coping strategies such as regular exercise, mindfulness, and connecting with fellow aspirants to share experiences and insights.