Which of the following is an important question to determine skin type?

Determining an individual's skin type is essential for tailoring appropriate skincare treatments and products. Each of the factors mentioned contributes valuable information about how the skin might behave under various conditions.

The reaction to sun exposure, whether a person burns or tans, is a crucial indicator of skin type. Those who burn easily often have fairer skin and may be more susceptible to conditions such as sunburn or skin cancer, influencing the type of protection and care they require.

Ethnic background can also play a significant role in skin type, as it often correlates with different skin tones and responses to environmental factors, including UV radiation. Understanding this can help in predicting skin's reaction to various treatments and potential sensitivities.

Finally, assessing how the skin reacts to trauma, such as cuts or abrasions, provides insight into its resilience and healing capabilities. This information is vital for determining the skin’s overall health and suitability for various treatments.

Therefore, all these aspects together form a comprehensive profile of an individual's skin type, making it essential to consider them collectively for effective skincare assessments and interventions.