Which of the following is not a contraindication for laser hair removal?

In the context of laser hair removal, grey hair is not considered a contraindication because laser technology primarily targets the pigment melanin in the hair. Since grey hair lacks significant melanin, it does not absorb the laser energy as effectively as darker hair types, making the treatment less effective but not outright contraindicated.

In contrast, the other options represent conditions that could pose risks during the procedure. A history of skin cancer may raise concerns about skin sensitivity and healing, while being pregnant may require caution due to hormonal changes affecting skin sensitivity. Open wounds in the treatment area can increase the risk of infection and complications, making it unsafe to proceed with laser treatments.