Pimples on the scalp occur mainly because of clogged hair follicles caused by excess oil (sebum) production, accumulation of dead skin cells and dirt, and inflammation. Hair follicles can get blocked from sweat, dirt, hair products like shampoos, gels, and sprays, or from bacteria and fungal infections. Hormonal changes and genetics may also play a role by increasing oil production, which further clogs pores. Additionally, friction from hats or headgear and insufficient hair washing can contribute to scalp pimples. Common causes include:
- Excess sebum or oil production by scalp glands.
- Build-up of hair care products that clog pores (known as acne cosmetica).
- Bacterial or fungal infections such as folliculitis.
- Hormonal fluctuations that increase oiliness.
- Sweat accumulation and friction from hats or helmets.
- Poor scalp hygiene or infrequent washing.
Scalp pimples can appear as small bumps, sometimes inflamed or pus-filled, and they require proper scalp hygiene and sometimes changes in hair care routines to clear up. More severe or persistent cases may require medical treatment. This explanation summarizes key reasons why pimples appear on the scalp, focusing on blockage of follicles by oil, dirt, products, and microbes, as well as the role of hormones and hygiene.
