Hi, does anyone out there know why I would have small dandruff bumps grouped together in two different areas of my scalp? What causes a dry scalp? There are like 4 or 5 bumps in one area and the other there are like 2 or 3. Im not allergic to anything that I am aware of. I have used some Nizoril twice in one week and it didn't help, I still feel some bumps of dandruff.