My son has a round spot on his head and is losing his hair in that area ..that area is dry flaky .. what can i do to help him?

Tines capitis: This a fungus; use tea tree oil or medicated shampoo to keep from spreading, but needs an oral medication to most effectively treat

See a dermatologist: This is too important to fool around. Forget the tea tree oil and other clumsy actions. Begin with accurate definition of the problem. A dermatologist is your best choice. There are various possible diagnoses, each with a different remedy.