Skin sensitivity evaluation: What could impact the assessment results?

Area of Science:

• Dermatology and Cosmetology
• Skin Physiology
• Biophysical Measurements

Background:

• Skin sensitivity evaluation is complex, affected by numerous variables.
• Standardization and exploration of influencing factors are crucial for accurate assessment.
• This study investigates seasonal, regional, and lifestyle impacts on sensitive skin indicators.

Purpose of the Study:

• To investigate the influence of seasons, facial regions, skin phototype, and lifestyle on sensitive skin indexes.
• To analyze changes in lactic acid stinging test results and biophysical parameters across different conditions.
• To identify key interfering factors affecting skin sensitivity evaluation.

Main Methods:

• 24 healthy subjects participated in the study.
• Lactic acid stinging tests were conducted seasonally.
• Transepidermal water loss (TEWL), hydration, sebum, and pH were measured.
• Statistical analysis correlated stinging responses with biophysical parameters and influencing factors.

Main Results:

• Facial skin exhibited variations in TEWL, hydration, sebum, and pH across different regions.
• Seasonal differences were observed in lactic acid stinging test results, with higher scores in autumn.
• Sleep frequency and spicy food consumption statistically impacted sensitive skin evaluation in phototypes III and IV.

Conclusions:

• Skin sensitivity assessments are significantly affected by seasonal changes, lifestyle, and facial location.
• Accurate skin sensitivity evaluation necessitates considering these interfering factors.
• Results provide insights for refining skin sensitivity testing methodologies.