If I understood it correctly...u might have boils or pimples over your scalp? If some like this !!
I m tell you two major reasons 1st your oily scalp, get dirt and sweat very easily there ,so do cleanse your scalp accordingly
Second too much kaph pitta dosha in your body but in this condition ,you might have boils in your other body parts also....
So relevant is the first one
Health Tips
you can use head mask also once in week with triphala ,yastimadhu , aloevera
this will help you