Which of the following conditions should be monitored after a laser hair removal session?

Monitoring for signs of infection after a laser hair removal session is crucial because the procedure involves the use of lasers that create heat and can cause tiny micro-injuries to the skin. These micro-injuries can make the treatment area more vulnerable to bacterial or viral infections. It's important to observe for any redness, swelling, pus, or increased pain, as these can indicate an infection that may require medical attention.

Other conditions such as elevation in blood pressure, muscle soreness, and weight fluctuations are generally not directly associated with laser hair removal. While a person may experience muscle soreness from other activities, it is not a common concern following the laser procedure. Likewise, blood pressure and weight fluctuations are more related to lifestyle factors or health conditions rather than the specific effects of laser hair removal.