From what you described I feel the hair loss or alopecia as in medical jargon is a result of dandruff and intense itching. The spot on face which peels like is also seborrhoeic dermatitis , all these are usually associated in a child who is atopic. The same explains his atopic asthma.Atopic dermatitis is the most common form of eczema. It often affects people who also have: Asthma or hay fever Family history of eczema, asthma, or hay fever Defects in the skin barrier, allowing moisture out and germs in Atopic dermatitis usually begins during infancy or childhood. But it can strike people at any age.Treatments for atopic dermatitis include: Products to lubricate and moisturize the skin Steroid creams and ointments Drugs that control the immune system Antibiotics to treat infections Ultraviolet light, alone or with a drug called psoralen I have explained all these for your information. You can review with your doctor for appropriate suggestion,. Take care, regards