What are the causes of cystic acne on the back in individuals with PCOS?

Reviewed by Yoshinori Abe, MD

Internal Medicine

Cystic acne on the back in people with PCOS is primarily caused by elevated androgen levels (male hormones) and chronic inflammation associated with the condition. These hormonal imbalances trigger excess sebum (oil) production, which combines with dead skin cells to clog pores. When bacteria become trapped in these clogged pores, deep, painful cystic lesions form along the back, shoulders, and upper body. Insulin resistance—common in PCOS—can further worsen breakouts by amplifying androgen activity.

Because back acne linked to PCOS often signals a deeper hormonal issue, treating the surface alone rarely delivers lasting results. Understanding the root cause is the first step toward clearer skin and better overall health. Take a free, instant, online symptom check to help identify what may be driving your symptoms and guide your next steps with confidence.

Reviewed for medical accuracy: 07/14/2026

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Explanation

Cystic acne on the back, especially in individuals with Polycystic Ovary Syndrome (PCOS), can be caused by a combination of factors. One important factor is hormonal imbalance, particularly increased levels of androgens, which are hormones that can make the skin produce more oil. This extra oil can clog pores, leading to acne.

Another factor is inflammation. Acne can be seen as an immune response, where the body reacts to clogged pores and bacteria by causing inflammation, leading to cystic acne. This inflammation can make acne more severe and harder to treat.

Here are some key points:

Hormones: High levels of androgens can increase oil production in the skin, causing clogged pores.
Inflammation: The body's immune response can cause inflammation, making acne worse.
Truncal Acne: Acne on the back is sometimes overlooked, but it is a common issue for those with PCOS.

Understanding these causes can help in managing and treating acne effectively. If you're experiencing persistent back acne or other concerning symptoms, try our free AI symptom checker to better understand what might be causing your symptoms and when to seek medical care.

(References)

Del Rosso JQ, Stein-Gold L, Lynde C, Tanghetti E, & Alexis AF. (2019). Truncal Acne: A Neglected Entity. Journal of drugs in dermatology : JDD, 31859617.
Antiga E, Verdelli A, Bonciani D, Bonciolini V, Caproni M, & Fabbri P. (2015). Acne: a new model of immune-mediated chronic .... Giornale italiano di dermatologia e venereologia : organo ufficiale, Societa italiana di dermatologia e sifilografia, 25876146.
Ng-Wong YK, Alexander B, Bartl M, Loftis CE, Hammad D, Dulgheru EC, et al. (2023). Report of a Rare Case of Follicular Occlusion Tetrad and .... Cureus, 37362514.

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