How long after sun exposure does sunburn typically appear?

Sunburn typically appears in the range of 2 to 8 hours after sun exposure due to the time it takes for the skin to react to UV radiation. When the skin is exposed to UV rays, it initiates an inflammatory response which can lead to redness, swelling, and pain. This process involves the activation of various immune cells and the release of inflammatory mediators, making the skin susceptible to damage.

The reason the timeline is characterized as 2 to 8 hours is that it allows time for the skin cells to absorb the UV radiation, undergo damage, and for the immune response to develop. Factors that can influence this timeline include skin type, the intensity of UV exposure, whether sunscreen was applied, and individual differences in skin sensitivity.

The other options suggest much earlier or longer times for the onset of sunburn, which do not accurately reflect the average response time of skin to UV exposure. Recognizing this timeline can help individuals identify sunburn symptoms promptly and take necessary precautions to prevent further skin damage.