What is a common sign of a scalp infection?

Redness and swelling on the scalp are significant indicators of a scalp infection. When an infection occurs, the body's immune response often manifests as inflammation, which leads to the characteristic redness and swelling. This response is a natural part of the healing process, signaling that the body is fighting off the infection. Infected areas may also feel warm and tender to the touch.

Other symptoms, such as dryness and itching, flaking of the scalp, or excess oil production, can also occur with various scalp conditions, but they are not specific indicators of an infection. Dryness and itching might suggest irritation or dermatitis, while flaking is often linked to conditions like dandruff or psoriasis. Excess oil production can occur due to hormonal changes, dietary factors, or even as a reaction to other scalp conditions, but again, these do not directly point to infection. Therefore, the presence of redness and swelling is a more definitive sign of a scalp infection, highlighting the inflammation typically associated with such conditions.