Nodular acne causes hard, solid, painful lumps deep under the skin without a pus-filled head. Cystic acne causes larger, soft, tender, red sacs filled with fluid and pus that feel squishy and break open easily.
Both are severe forms of inflammatory acne, meaning red, swollen breakouts that start in blocked pores. Both develop from blocked pores, excess oil, bacteria called Cutibacterium acnes, and inflammation. They favor the face, chest, back, and shoulders in teens and adults with hormonal shifts.
Medical information disclaimer: This article is for general educational purposes only and does not provide medical advice, diagnosis, or treatment. Always consult a physician or other qualified health professional about symptoms, medications, tests, or treatment decisions.
Table of Contents
- How can you tell which type you have?
- Why do they form and where do they appear?
- What treatment clears both types?
- When do doctors use isotretinoin, shots, or drainage?
How can you tell which type you have?
Nodular breakouts feel like hard, solid lumps anchored deep under the skin. They hurt to touch and have no whitehead or pus-filled tip. Medicover Hospitals notes in its nodular acne review that these lumps can last for weeks to months.
Cystic breakouts feel larger, softer, and full of fluid. They look red, feel tender and squishy, sit deeper than nodules, and rupture easily. Cleveland Clinic explains in its cystic acne overview that these sacs hold fluid and pus.
- Nodule: hard, solid, painful lump with no head, lasts weeks to months.
- Cyst: soft, squishy, red, tender sac with fluid and pus, breaks easily.
Why do they form and where do they appear?
Cleveland Clinic describes both types as severe inflammatory acne from blocked pores, excess sebum, Cutibacterium acnes, and inflammation. That deep inflammation explains pain, swelling, and slow healing.
The same source notes breakouts favor the face, chest, back, and shoulders. Teens develop them often, as do adults during hormonal shifts.
What treatment clears both types?
Drugstore creams alone rarely clear these deep lesions. Both types usually need dermatologist care.
The American Academy of Dermatology recommends topical retinoid, benzoyl peroxide, and antibiotic combinations plus oral doxycycline in its 2024 acne guidelines summary. The American Academy of Dermatology also reports higher rupture risk for cystic sacs. Rupture raises risk of permanent scars and dark spots that fade over months to years.
When do doctors use isotretinoin, shots, or drainage?
Oral isotretinoin is strongly recommended as first-line for severe, hard-to-clear nodular acne and for acne with scarring or poor response. NIH reviewers summarizing AAD guidance describe in their JCAD review first-line use for these cases. Typical dosing starts at 0.5 mg per kg per day toward 120 to 150 mg per kg total. Cleveland Clinic notes dermatologists can inject diluted corticosteroid directly into a large, painful nodule or cyst.
Swelling and pain often ease within 24 to 48 hours. Dermatologists may also drain a pus-filled cyst surgically. The American Academy of Dermatology finds limited evidence that chemical peels, laser, or light therapy clear nodules. These drugs and procedures need medical monitoring, so do not pick, squeeze, or inject at home.