What are the signs of overexposure to UV rays?

The signs of overexposure to UV rays typically manifest as redness, blistering, and peeling of the skin. This reaction is part of the body's defense mechanism against skin damage caused by excessive ultraviolet radiation. When the skin is overexposed to UV rays, it can become inflamed, resulting in erythema (redness), and in more severe cases, blisters can form as the skin reacts to protect itself from further damage. Peeling occurs as the body sheds damaged skin cells in an attempt to heal.

In contrast, darkening of the skin and slight tanning are often normal responses to moderate UV exposure, as this indicates the skin is producing more melanin, a natural protective mechanism. Increased elasticity is not a sign of UV overexposure, but rather a desirable trait associated with healthy skin. Therefore, blistering and peeling distinctly signify overexposure to UV rays, marking the correct choice in this context.