What condition is NOT one that requires medical referral according to common salon standards?

Normal dandruff is generally considered a superficial condition that does not pose a significant health risk and is commonly experienced by many individuals. It typically does not require medical intervention or referral since it is often manageable with over-the-counter shampoos and treatments specifically designed to control flaking and dryness of the scalp.

In contrast, open wounds on the scalp, lice infestation, and severe itching or irritation may indicate more serious underlying health issues that require professional medical attention. These conditions can pose risks not only to the individual experiencing them but also to others if they are contagious, such as in the case of lice. Thus, normal dandruff stands apart from these other conditions in that it does not necessitate referral to a healthcare professional.