Teenage acne is largely driven by a sudden surge in androgens during puberty. These hormones increase sebum production across the entire face, which is why adolescent breakouts tend to be widespread and oily-skin-associated.

Adult acne, particularly in women, tends to concentrate along the lower face, jawline, and chin. It often appears in the week before menstruation, worsens during periods of high stress, and can occur even in people who do not have particularly oily skin. This pattern points strongly toward a hormonal and inflammatory driver rather than a purely sebaceous one.

In your 30s, fluctuating oestrogen and progesterone levels affect how sensitive your follicles are to androgens. Even if your androgen levels are technically within the normal range, increased receptor sensitivity at the follicle level can produce the same result as elevated androgens: excess sebum, follicular blockage, and inflammation.

Conditions such as PCOS, thyroid dysfunction, and perimenopause-related hormonal shifts are also common contributors to adult breakouts that are frequently overlooked or not investigated until symptoms have persisted for years.

Cortisol, the hormone released in response to stress, directly stimulates sebaceous glands. In adults managing demanding careers, poor sleep, and chronic low-grade stress, cortisol levels can remain chronically elevated. This creates a persistent sebum-overproduction environment that keeps breakouts cycling regardless of skincare routine.

Cortisol also impairs skin barrier function and increases skin inflammation, which means stressed skin is not only more prone to breaking out but also slower to heal once it does.

Many adults respond to breakouts with aggressive drying and exfoliating routines. Stripped skin responds by overproducing oil. The barrier breaks down, inflammation increases, and the breakout cycle continues or worsens. Over-cleansing and excessive acid use are among the most common ways people inadvertently maintain the very condition they are trying to treat.

Effective treatment of adult acne requires identifying which combination of factors is driving it. A consultation that includes assessment of hormonal patterns, stress levels, diet, and current skincare routine provides far more useful information than simply looking at the skin in isolation.

Depending on the underlying cause, treatment may involve a combination of topical actives, in-clinic protocols such as chemical peels, PRP, or light-based treatments, and in some cases hormonal investigation and management. Treating the skin without addressing the root cause produces temporary improvement at best.