There are many reasons for itchy scalp bumps, the common ones are urticaria, contact dermatitis, tinea capitis, eczema and so on. 1. Urticaria: A variety of causes of irritation can cause limited skin edema, resulting in skin clamminess and itching, which may cause itchy bumps on the scalp symptoms. 2. Contact dermatitis: scalp contact with external sensitizers, such as shampoo, hair dye, etc., resulting in contact site allergic reaction, can cause contact dermatitis at the contact site, resulting in skin erythema, rash, blisters, etc., can also lead to itchy scalp bumps. 3. Tinea capitis: Tinea capitis is caused by fungal infection, which may also lead to itchy scalp bumps, and most of them are accompanied by dandruff increase and other symptoms. 4. eczema: eczema is internal and external stimulation of a variety of factors causing inflammatory skin reactions, can also cause rashes, itching, acute phase may have a tendency to ooze; chronic eczema will cause skin thickening, roughness, may also cause itchy scalp goose bumps. Itchy bumps on the scalp, there may be other reasons, it is recommended to go to the hospital in a timely manner to check, follow the doctor’s instructions for treatment.