Scalp always itchy, may and seborrheic dermatitis, allergy, drug dermatitis and other factors.
1. Seborrheic dermatitis: patients with itchy scalp may be related to seborrheic dermatitis, which is mainly caused by exuberant sebaceous gland secretion, accompanied by a large number of dandruff.
2. Allergy: If the patient is allergic, it will also lead to itchy scalp, common urticaria, contact dermatitis, eczema and so on.
3. Drug dermatitis: drug dermatitis refers to the use of certain drugs, scalp itching.
The scalp is always itchy there may be other reasons, it is recommended to go to the hospital in a timely manner to carry out the relevant examination, clear cause of the symptoms of the active treatment.