Core Viewpoint - The article discusses the pros and cons of using a hairdryer versus letting hair air dry, emphasizing the impact on hair and scalp health. Group 1: Hair Drying Methods - Using a hairdryer can damage hair quality, making it dry, brittle, and prone to split ends due to the heat and strong airflow [2][4]. - Natural air drying helps maintain hair quality and provides a healthy shine by avoiding the damaging effects of high temperatures [4][7]. Group 2: Hair Structure and Damage - Hair consists of a complex structure including the medulla, cortex, and cuticle, with the cuticle serving as a protective barrier [3]. - Damage to the cuticle from heat can lead to moisture loss and increased friction between hair strands, further harming hair quality [4][5]. Group 3: Scalp Health - High temperatures from hairdryers can dry out the scalp's protective barrier, leading to issues like itching and flaking [5]. - Prolonged exposure to heat can also cause scalp inflammation and discomfort [5]. Group 4: Practical Considerations - Natural drying takes longer, which may be inconvenient for those with busy schedules or who wash their hair before bed [7][9]. - For those needing quick drying or styling, hairdryers can be beneficial, but occasional use is recommended to minimize damage [9][10]. Group 5: Recommendations for Hairdryer Use - It is advisable to use a towel to gently absorb excess water before using a hairdryer and to use the cool setting for styling [10][11]. - The recommended method is to dry the roots first before moving to the ends to prevent additional damage [12].