hi..thanks for your query
At this age, you should always consult a dermatologist
before starting a therapy.The scabs may be due to infection or any eczematous disorder.Oral antibiotic therapy may be required.
Do not scratch the affected areas , as by doing this you might inoculate more infection from the surrounding contaminated areas.
For the dryness, you can use medicated moisturizers like cetaphil
moisturizer to relieve the dryness.
Hope this helps.take care!