Using large language models (LLMs) to answer patients' questions is promising but calls for caution and careful validation. We assessed GPT-4o mini-generated answers to dermatology-related patient questions and compared them to specialists' answers. While GPT-4o mini provided clearer and more updated information, some answers contained inaccuracies that could lead to risky patient management. Future work should explore retrieval techniques from reliable sources to enhance safety and accuracy.