What should you know about tiny hard bumps on skin?

Small rough bumps on the outer upper arms or thighs can fit [Keratosis Pilaris](/conditions/keratosis-pilaris/). Tiny white, firm bumps on the face may be [Milia](/conditions/milia/), which contain trapped keratin. Red or tender bumps around hairs may indicate [Folliculitis](/conditions/folliculitis/), while prickly clusters after heat and sweating can fit [Heat Rash](/conditions/heat-rash/). A persistent group of itchy, flat-topped or purplish bumps has a different pattern and may need evaluation for [Lichen Planus](/conditions/lichen-planus/). These are possibilities, not a diagnosis from appearance alone.

Cleanse gently, avoid picking, and reduce friction, heavy occlusive products, and prolonged heat when these seem to trigger the bumps. Do not scrape hard white bumps or use strong acids without advice. A clinician may recommend a moisturizer that softens rough keratin, treatment for follicle inflammation, or an [Antihistamine Treatment](/treatments/medical-dermatology/oral-antihistamine-therapy/) when itch is prominent. Selected lesions may be treated with [Cryotherapy (Lesion Removal)](/treatments/surgical-dermatology/cryotherapy-lesion-removal/).

Arrange an assessment if bumps spread, persist despite gentle care, repeatedly become sore, or leave marks. Seek prompt care for rapidly worsening redness, pus, significant swelling, fever, or severe pain. A bump that bleeds, forms a persistent crust, or changes in color or shape should be examined rather than treated at home.

Ask whether the bumps arise from follicles, keratin, heat, or another condition; which ingredients to avoid; and whether treatment is intended to smooth texture, calm inflammation, or remove a lesion.