The most likely cause for an itchy scalp in this age group remains headlice.Sometimes the eggs are difficult to see. It is unusual that the shampoo made no difference. Your son may have a fungal infection of his scalp which is also difficult to see especially in the early stages. Wash his hair with Niz-Shampoo and see if this helps him. If he is no better after 14 days he should be seen by a dermatologist.
The information provided does not constitute a diagnosis of your condition. You should consult a medical practitioner or other appropriate health care professional for a physical exmanication, diagnosis and formal
advice. Health24 and the expert accept no responsibility or liability for any damage or personal harm you may suffer resulting from making use of this content.