Nodule

Nodule — a large, firm, inflamed lesion that develops deep within the skin, often feeling like a solid, painful lump beneath the surface. Nodular lesions represent a more severe form of acne because the inflammation extends into the deeper layers, and they carry a higher risk of scarring.

Key points

• Nodules form deeper in the skin than papules or pustules and lack a visible pus head.
• They are typically firm to the touch and can be painful or tender.
• Because inflammation reaches deeper tissue, nodules are more likely to leave scars.
• They often persist for weeks and generally do not resolve with over-the-counter products alone.
• Nodular acne is usually considered a condition that warrants professional dermatological care.

Frequently asked

How is a nodule different from a pustule?

A nodule is a large, solid, deep-seated lump without a visible pus center, while a pustule is a smaller, surface-level lesion with visible pus.

Can nodular acne be treated at home?

Nodules sit deep in the skin and often do not respond to over-the-counter products, so this type of acne is best assessed and managed by a dermatologist.

Related topics

• What Is a Humectant?
• What Is the Skin Barrier?

This is a foundational entry in the SYNC Skin Encyclopedia and is expanded over time. Educational information only — not medical advice.