Core Viewpoint - The article discusses the increase in hair loss during the transition from winter to spring, highlighting that while some hair loss is normal, persistent excessive hair loss may indicate underlying health issues that require attention [1][2]. Group 1: Normal Hair Loss and Health Indicators - Normal hair loss ranges from 50 to 100 strands per day, which is considered a part of the body's metabolic process [1]. - Excessive hair loss, defined as more than 100 strands daily for over three months, or symptoms like patchy hair loss and noticeable thinning, should raise concerns about potential health problems [1]. Group 2: Associated Health Conditions - Various health conditions may be linked to persistent hair loss, including iron deficiency anemia, thyroid dysfunction, and seborrheic dermatitis [1]. - Autoimmune diseases and diabetes may also indirectly affect hair follicle health, leading to abnormal hair loss [1]. Group 3: Lifestyle Factors Contributing to Hair Loss - Poor lifestyle choices can exacerbate hair loss, such as irregular sleep patterns, high stress levels, unhealthy diets, and excessive hair treatments [1]. - Specific factors include frequent late nights, high-fat and high-sugar diets, insufficient hydration, and overuse of hair dyes and harsh shampoos [1]. Group 4: Recommendations for Managing Hair Loss - To alleviate abnormal hair loss, it is recommended to adjust lifestyle habits, including ensuring 7 to 8 hours of sleep, maintaining a balanced diet rich in protein, fruits, and iron, and managing stress through exercise [2]. - If hair loss persists despite lifestyle changes or is accompanied by symptoms like dizziness, fatigue, sudden weight changes, or scalp discomfort, medical consultation is advised to investigate potential underlying conditions [2].

Core Viewpoint - The article emphasizes that proper hair washing techniques and the selection of effective ingredients are crucial for hair health and growth, rather than relying solely on new shampoos [1]. Group 1: Hair Washing Techniques - The effectiveness of shampoo ingredients requires sufficient contact time with the scalp, typically 3-5 minutes for active components like caffeine and saw palmetto [2]. - Washing frequency should be tailored to individual needs; for oily scalps, washing every 1-2 days is recommended, while dry scalps can extend to 3-5 days [3]. - Proper scalp cleaning is essential, involving techniques such as using warm water to open hair cuticles and massaging the scalp to enhance blood flow by up to 20% [4]. Group 2: Active Ingredients in Shampoos - Salicylic acid, a beta-hydroxy acid, is effective in removing scalp oil and dead skin cells, suitable for oily scalps, and should be used 1-2 times a week [5]. - Caffeine has been shown to inhibit hair follicle miniaturization and promote hair growth by increasing energy signals within follicle cells [5]. - Herbal ingredients like cedar leaf and he shou wu (fo-ti) can improve scalp circulation and prolong hair growth phases, with specific usage recommendations for their extracts [7].