What is the definition or description of: scalp itching?

Seborrheic derm: Itching in the scalp can be triggered by a variety of causes. The most common is seborrheic dermatitis, an inflammation of the scalp producing redness and flaking. Psoriasis can involve the scalp in a similar pattern. Stress can manifest as scalp itching, especially on the back of the scalp. Try a dandruff shampoo and scalpicin (hydrocortisone lotion) and see a dermatologist.