Which of the following conditions may prohibit a facial massage?

Facial massage can promote relaxation and improve circulation to the skin, but certain conditions can contraindicate this practice. High blood pressure is a significant concern when it comes to facial massage; those with this condition may be sensitive to the effects of massage, which can stimulate circulation and elevate blood pressure further. Massage may also lead to increased stress on the cardiovascular system, making it essential to avoid it for individuals with hypertension unless they are under professional guidance.

On the other hand, hair loss, sunburn, and normal skin do not inherently require the prohibition of facial massage. While sunburn can be painful and sensitive to touch, it's specific to the condition's severity, and adjustments to technique may be needed. Hair loss does not impact the safety of facial massage, and normal skin typically indicates that the skin's integrity and function are stable, thus making massage safe and beneficial.

In summary, high blood pressure is the only condition from the options listed that presents a direct contraindication for facial massage due to potential adverse effects on the body's system.