What is a common cause of scalp irritation during a service?

Scalp irritation during a service is commonly caused by allergic reactions to hair products or improper cleaning of tools. Hair products often include a variety of chemicals and fragrances that can trigger allergic responses in sensitive individuals, leading to symptoms like redness, itching, or inflammation. Additionally, if tools are not properly cleaned and sanitized after previous use, they can harbor irritants or bacteria that may also cause irritation when in contact with the scalp.

Understanding the importance of conducting a patch test for new products and maintaining proper hygiene with tools is vital for preventing these adverse reactions, highlighting why this option is the most relevant cause of scalp irritation.