Area of itchey scalp

I have a dry red patch on my scalp that is extremely itchy at the base. I have used a topical ointment with no effect. The ointment was cortizone.

[Dr Santos]

Hi,

This could be  a fungal infection, dermatitis, or other skin conditions such as psoriasis. Are there other signs or symptoms present? Contact dermatitis is an inflammatory condition caused by an external agent. Irritant contact dermatitis of the scalp can occur from overuse of medicated shampoo, chemicals and excessive heat applied to the scalp. The commonest cause of allergic contact dermatitis of the scalp is hair dye allergy. Dermatitis presents as itchy scaly red patches on the scalp, hairline and ears. It would be best to have this evaluated further by your doctor. Treatment usually depends on the underlying cause.  

Take care and keep us posted.