Acne around the jawline often shows up because of hormones that make your skin produce extra oil and clog pores. This type of breakout is common in adults, especially women, and tends to cluster along the lower face.
Hormones like androgens play the biggest role. These are male hormones everyone has, but when levels rise, they tell oil glands in your skin to work overtime. The extra oil, called sebum, mixes with dead skin cells and blocks hair follicles. Bacteria then grow inside, causing swelling and pimples. Jawline acne is a classic sign of this because that area has more oil glands sensitive to hormones.[1][3][5]
In women, these flares often happen before periods when progesterone goes up. It can also link to conditions like polycystic ovary syndrome, or PCOS, which raises androgen levels and brings other signs like irregular periods or extra facial hair. Starting or stopping birth control, pregnancy, or menopause can trigger it too. Men can get it from similar hormone shifts, though less often talked about.[1][3][6]
Stress makes it worse by boosting cortisol, another hormone that ramps up oil. Poor sleep, high sugar foods, dairy, or even heavy makeup can add fuel. Some medicines like steroids or lithium might cause breakouts in this spot. Genetics also matter, if family members have acne issues.[2][4][6]
The pimples here are usually deep, painful cysts that scar easily, not just surface zits. They heal slowly because of the strong inflammation deep under the skin.[2][6]
Sources:
https://www.droracle.ai/articles/642363/what-are-the-causes-and-treatment-options-for-acne
https://londondermatologyclinics.com/cystic-acne-your-guide-to-causes-and-management/
https://www.tuftsmedicine.org/about-us/news/acne-over-30
https://www.westchestercosmeticdermatology.com/blog/adult-acne-why-it-happens-and-how-to-treat-it/
https://drankitmehra.com/blogs/hormonal-acne-causes-treatment-dermatologist-guide
https://www.drbatras.com/hormonal-acne-what-causes-it-and-how-to-treat-it
