Scalp rash and itching, this condition may be a certain inflammation in the scalp area, and this inflammation may be most commonly known as seborrheic dermatitis in clinical practice. For the treatment of seborrheic dermatitis, you can generally take appropriate oral antihistamines to control the local red papules, and also to control the itching symptoms, you can take appropriate oral loratadine or levocetirizine hydrochloride, etc. If itching is obvious, you can also take first generation antihistamines such as ketotifen or paracetamol. Of course, you can also use topical medications to stop itching and anti-inflammatory, you can use topical Hassinide solution topically, you can also use compound ketoconazole shampoo to wash your hair, or use coal tar shampoo to wash your hair, this can control the local inflammation and dandruff occurrence.