You can tell social media is affecting your self-esteem if you often feel sad, anxious, or start doubting yourself after scrolling. Signs include comparing yourself to others, feeling upset over likes or comments, or losing interest in real-life activities. If you notice these feelings, try taking breaks, unfollowing accounts that bring you down, and spending more time on things that make you feel good offline. Recognizing these signs early helps you protect your confidence and well-being.