"Scalp acne is characterized by painful pimples on ... occurs when hair follicles become inflamed due to a bacterial or fungal infection, not just clogged. As a result, the bumps are usually ...

So there are things anywhere from a fungus on the scalp, to true psoriasis on the scalp, to eczema or an allergic reaction. So if your dandruff is not improving, that's the time to seek the care ...