What sign may indicate over-treatment in laser therapies?

Prolonged erythema or discomfort is a significant indication of over-treatment in laser therapies. When the skin experiences excessive heating or energy application from the laser, it can lead to extended redness and soreness beyond what is typically expected from the treatment. This prolonged reaction suggests that the skin has been stressed more than it can handle, leading to potential damage rather than the desired therapeutic effects.

The other choices do not signify over-treatment. Increased skin elasticity and improved skin texture could reflect positive outcomes from laser therapy, indicating effective treatment response rather than over-treatment. Similarly, quick healing times suggest that the skin is responding appropriately to the laser treatment, aligning with proper treatment parameters rather than excessive energy exposure.