My hair are very long n healthy .but from some days when I have a hair wash .in the evening my scalp gets oily. And the next day it turns very much .my hair are extremely straight n black. I did not had any treatment or anything I just apply coconut oil to my hair. Bcoz of this problem. I have to wash my hair every alternate day. Which is really bad for my hair. I use head and shoulders silky soft to avoid dandruffs .plz suggest me any remedy. For my oily scalp. My hair are very healthy but the oily scalp turns to be a spoilsport. please help me with any remedy and why is this happening so. Thanking you in anticipation.