Which of the following situations should avoid brushing, massage, or scalp treatment?

The appropriate situation to avoid brushing, massage, or scalp treatment is when the scalp is irritated. This is crucial because irritation can indicate underlying issues such as inflammation, infection, or sensitivity that could be worsened by any mechanical action like brushing or massaging. When the scalp is irritated, it is essential to handle it gently and avoid any treatments that could exacerbate the problem, potentially causing discomfort or further harm.

Understanding this is also important in a broader context. For instance, brushing dry hair can lead to damage but does not inherently pose a risk to scalp health like irritated skin does. Similarly, after a haircut, the hair may need styling or care, and using hair oil provides moisture which can be beneficial. However, when the scalp is compromised, ensuring it is treated delicately is the priority.