Big closed comedones: what they are and what to do

A closed comedone forms when oil and dead skin cells block a hair follicle while its opening remains covered. It may look white or skin-coloured and feel like a firm bump. A larger or deeper bump can resemble an inflamed acne lesion or milia, so appearance alone may not settle the diagnosis. Closed comedones are a typical presentation of comedonal acne, while acne may also include blackheads, inflamed spots, or deeper tender lesions.

Wash with a mild cleanser, avoid harsh scrubs, and choose skin and hair products labelled non-comedogenic where possible. Do not pierce, squeeze, or dig at a large bump: pressure can rupture the follicle wall, increase inflammation, leave dark marks, or cause scarring. A clinician may suggest a topical retinoid to reduce follicle plugging, but it can irritate skin and may not suit everyone. Professional extraction is performed with suitable technique and is different from squeezing at home.

Arrange a dermatology assessment if the bump is painful, increasingly red, warm, draining, rapidly changing, repeatedly returns, or leaves marks. Seek prompt care if redness spreads, swelling develops around the eye, or you feel generally unwell. A persistent solitary bump that does not behave like your other whiteheads also deserves examination because cysts and milia can look similar.

Ask whether the bump is a closed comedone or another lesion, which products might be clogging your pores, and whether extraction or a leave-on treatment fits your skin. Mention pregnancy, plans for pregnancy, eczema, sensitive skin, and every acne product already in use before discussing a retinoid.