Loss of hair since 3 months, gradually increasing. Diagnosis and Treatment?

please diagnose this lesion since 1 yr. 20 yrs m student

5 years old boy got the bald before 2 to 3 days and it doesnt have any other symptom What is your dx and rx on this

5 y female hair fall , no scaling of skin not any medical history plz give comments.

Male 27 years old lesions for months Itching present rest is normal DIAGNOSIS ??