Which of the following factors can increase the likelihood of skin sensitivity?

• A. Aged skin
• B. High humidity levels
• C. Overexposure to sun
• D. Cold weather

Answer: (C)

Overexposure to the sun can significantly increase the likelihood of skin sensitivity. When the skin is subjected to excessive sunlight, it can become damaged, leading to conditions such as sunburn, which results in inflammation and irritation. This occurrence can compromise the skin's barrier function, making it more susceptible to irritants and allergens. Furthermore, repeated sun exposure can lead to long-term changes in the skin's structure, reducing its ability to protect itself, and thereby increasing sensitivity over time.

In contrast, while aged skin may become more prone to sensitivity due to decreased moisture and elasticity, it is not as direct a cause as sun exposure. High humidity levels can actually help maintain skin hydration, which usually decreases sensitivity. Cold weather tends to dry out the skin, potentially leading to sensitivity, but the immediate and significant impact of sun exposure typically surpasses these factors in terms of provoking a reaction.