Perfectionism in adolescents can manifest in various ways. Here are some common symptoms to look out for:

1. High standards: Adolescents with perfectionistic tendencies often set exceptionally high standards for themselves, constantly aiming for perfection in various areas of their lives, such as academics, sports, or relationships.

2. Fear of failure: They may display an intense fear of failure and avoidance of tasks or activities where they feel they might fall short of their own expectations. This fear can lead to procrastination or giving up on challenges altogether.

3. Self-criticism: Perfectionistic adolescents tend to be excessively self-critical, often berating themselves for not meeting their own impossibly high standards. They may feel that any mistake is a personal failure and struggle to accept constructive feedback.

4. Overachievement: They may engage in excessive overachievement, constantly striving to outperform others or themselves. This can result in chronic stress and burnout as they relentlessly push themselves to meet their unrealistically high goals.

5. Rigid thinking: Adolescents with perfectionistic tendencies often have rigid thinking patterns and struggle with flexibility. They may become easily frustrated or anxious when faced with unexpected challenges or when things don't go according to plan.

6. Negative impact on self-esteem: Despite their outward successes, perfectionism can negatively impact their self-esteem. They may never feel good enough, always striving for an unattainable perfection that leads to perpetual dissatisfaction.

It's important to note that not all adolescents exhibiting these symptoms are perfectionists, as some overlap with other mental health conditions. If you're concerned about your own or someone else's well-being, it's always recommended that you seek professional advice from a mental health expert.