What is a common cause of scalp irritation after hair treatment?

Scalp irritation following a hair treatment is often linked to an allergic reaction to products used during the procedure. When individuals undergo hair treatments such as coloring, perming, or straightening, various chemicals are involved. These chemicals can sometimes provoke a sensitivity or allergic response in some clients, leading to symptoms like itching, redness, or inflammation of the scalp.

Many hair care products contain strong ingredients, including ammonia, peroxide, and various fragrances, which may not be suitable for everyone. A thorough consultation and patch testing before applying these products can help minimize the risk of an allergic reaction.

Considering the other options, poor ventilation may contribute to discomfort but isn't a direct cause of scalp irritation. Using room temperature water is generally encouraged for comfort and typically does not cause irritation. Improper product application, while it can lead to other issues, isn't as directly associated with allergic reactions as the ingredients in the products themselves. This context reinforces the significance of being aware of product ingredients and their potential effects on clients' sensitivities.