What are the reasons for itchy scalp in children?

Patient's question:

Basic Information: Female, 11 years old
Disease/Symptoms: Itching scalp, the itching stops after pulling out the hair
Condition Description: Could you please tell me why my daughter has been pulling out her hair since last July? She says the itching stops after pulling out the hair. What could be the reason?

Doctor's answer:

Hello. The itchy scalp of the child may be caused by a fungal irritant reaction. The scratching caused by itching may further damage the scalp and hair. It is recommended to take the child to a regular hospital for examination to avoid the harm caused by long-term hair removal to the body. If lead is detected, you should eat less or not eat high-lead foods such as loose eggs, popcorn, and poor-quality canned drinks. Eat more calcium, iron, and zinc foods. Pay attention to a balanced diet. Use less lead-containing kitchen utensils and food at home. Containers, paints, coatings, cosmetics, and enameled ceramics. If necessary, please check some lead oral liquids for regulation.