✔ 最佳答案
if there is itchy skin problem at the head, this can be 濕疹 or 頭癬.
these two problems are sometimes difficult to distinguish even for doctors.
but they will give you oral medicine for your itchiness, and cream to kill the fungus and steriod to control allergy.
for the loss of hair, if underlying problem resolves, usually hair will grow back. Otherwise, there are some lisensed medication avaliable in HK for your hair condition. You can consult your family or skin doctor