Suggest Treatment For Pimples And Dandruff

hi sir ,im 21 yrs old girl.i have a terrible skin.my scalp is filled with scaly dandruff and small small pimple like stuff(dont kn what they are)throughout my face and some part of my shoulders,i understand that is because of my dandruff. i always keep my scalp clean free from dirt . plz help me to get rid of this problem..