Laser Technician IBEC Board Exam 2025 - Free International Board of Electrologist Certification Practice Questions.

Persistent red spots on the skin after treatment are primarily caused by the persistent dilation of blood vessels. During laser treatments, the energy delivered can cause temporary changes in blood flow, leading to the dilation of superficial blood vessels in the area being treated. If these vessels do not constrict properly after the procedure, it can result in redness or spots that linger longer than normal.

This condition can be particularly evident in areas where the skin is sensitive or where there has been a considerable amount of energy applied, leading to increased vascularity as a physiological response to the procedure. Typically, this redness should diminish over time; however, in some cases, it can remain for extended periods, giving the appearance of persistent spots.

While other factors such as allergic reactions, untreated infections, and excessive sun exposure can contribute to skin irritation or change in appearance, they are not specifically linked to the lingering vascular response expected after treatment, making the persistent dilation of blood vessels the primary cause in this context.