It could also be due to Psoriasis of the
scalp.
Scalp psoriasis and
seborrheic dermatitis can be difficult to differentiate. Both are common conditions that affect the scalp. In addition, they share similar symptoms, such as itchy, red, scaly skin and burning /soreness of the scalp.
Treatment is the same for both, which is shampoos containing coal tar, ciclopiroxolamine ketoconazole, selenium sulfide, or zinc pyrithione.
Let us know if you need any other information.
Regards.