Some causes for an itchy scalp are dandruff, seborrheic dermatitis, psoriasis, an allergic reaction, tinea capitis and head lice, states Cleveland Clinic - HealthHub. Seborrheic dermatitis can cause scalp symptoms, such as scaly patches and skin that is also red and itchy. This is a skin disorder that can also develop on other body areas, including the face and back, notes Mayo Clinic.Continue Reading
When seborrheic dermatitis develops on the scalp, it is known as dandruff, notes WebMD. Dandruff develops on the scalp due to an overgrowth of yeast found on the scalp. Depending on the severity of the condition, there are a few ways to treat seborrheic dermatitis of the scalp, including antifungal shampoos, corticosteroid creams and oral antifungal medications, states Mayo Clinic.
Scalp psoriasis can present symptoms, such as red and scaly patches on the scalp that may itch. Although psoriasis may resemble dandruff, it is not this condition. Psoriasis is a disorder of the immune system that affects the skin.
Tinea capitis or ringworm can also cause bald patches and an itchy scalp. Ringworm, which is a fungal infection that affects the scalp and hair shaft, is also a very contagious infection. To treat ringworm, doctors can prescribe oral antifungal medicines.
Allergic reactions to hair dyes and other hair products may also produce scalp itch. Head lice infestations are other common causes for an itchy scalp. A head lice infestation can also include symptoms, such as lice nits on the hair shafts that resemble dandruff.Learn more about Skin Conditions