What adverse effect may result from excessive laser fluences?

Excessive laser fluences can lead to purpura, which is characterized by discoloration of the skin due to bleeding underneath the skin’s surface. This occurs when high energy from the laser causes damage to the small blood vessels (capillaries), leading to leakage of blood into the surrounding tissue. Purpura can manifest as small purple or reddish spots on the skin and is often a sign that the skin has been subjected to a level of energy that exceeds its threshold for safe treatment.

While inherently related skin responses may occur from increased laser fluences, such as burns, blistering, and potentially scarring, purpura specifically highlights the vascular response rather than thermal damage or surface-level injuries. Understanding this distinction helps in managing and anticipating potential outcomes in laser treatments and underscores the importance of adhering to recommended fluence levels to ensure patient safety.