What are common signs of a scalp disorder?

Redness and irritation are commonly recognized signs of a scalp disorder, making this the correct answer. These symptoms may indicate underlying issues such as inflammation, infection, or irritation. Conditions such as dermatitis, psoriasis, or folliculitis often present with physical signs of redness, itching, or flaking on the scalp. Identifying these symptoms is crucial for diagnosing the nature of the scalp disorder and determining appropriate treatment.

In contrast, a shiny and healthy scalp, even hair growth, and a perfectly clean scalp are typically signs of a normal, healthy scalp condition. While shiny and healthy scalps can be indicative of good scalp care, they do not reflect any signs of disorder. Similarly, even hair growth and cleanliness are desirable characteristics and do not signify any scalp issues. Therefore, while signs of scalp health are beneficial, they do not indicate the presence of a disorder like redness and irritation do.