Several different problems can present as an itchy and red
sore on the
scalp. The most common reasons for dry, red, irritated
scalp are seborrhea and psoriasis. If scratched, any condition on the scalp can get infected and become more itchy or painful.
Also, fungal infections or ringworm of the scalp can also present as an itchy, red scalp.
In addition, applying a variety of treatments may cause an allergic contact dermatitis.
Is there any way you can get to a dermatologist quickly?