“Our skin develops pimples when pores get clogged because of sebum, the body’s natural moisturiser, or dead skin cells,” says dermatologist Dr Nivedita Dadu. “Scalp pimple occurs for the same reasons, except it shows up either along the hairline or beyond that, on the scalp. Not washing the hair regularly and thoroughly, wearing tight headgear, and build-up up hair products on the scalp are some causes of scalp pimples.