What is eucalyptus in skincare?
Eucalyptus oil is distilled from the leaves of eucalyptus trees, most commonly Eucalyptus globulus. Its dominant constituent is 1,8-cineole, also called eucalyptol, which produces both its sharp camphoraceous scent and its antimicrobial effect.
It is far better known in respiratory products than in skincare, and where it does appear in topicals it is usually at low concentrations for scent and a cooling sensation. Its antimicrobial and anti-inflammatory activity is documented but it is a potent essential oil.
What skin concerns does eucalyptus treat?
Its antiseptic properties make it useful in products for minor cuts, grazes and insect bites, and it appears in some formulations for cold sores, athlete’s foot and body acne.
For facial skincare the picture is less favourable. Eucalyptus is highly volatile and a recognised sensitiser, it can trigger rosacea flares, and near the eyes it causes stinging and irritation. It should never be used undiluted or ingested.
What ingredients are best paired with eucalyptus?
If used, dilute it heavily in a carrier oil such as olive, jojoba or sweet almond, and keep it to body applications rather than the face.
For the facial concerns eucalyptus is sometimes reached for – congestion, acne, inflammation – salicylic acid, niacinamide, azelaic acid and tea tree oil are better supported and far less likely to irritate. Patch test before any use. Take our Skin Quiz.
What is cystic acne?
Cystic acne is the most severe form of inflammatory acne. Instead of surface pimples, it produces deep, tender nodules and fluid-filled cysts that sit under the skin, often without ever coming to a head.
It happens when a blocked follicle ruptures deep in the dermis and spills sebum, keratin and bacteria into surrounding tissue, triggering a strong immune inflammatory response. Because the damage is deep, cystic acne is the type most likely to scar.
What causes cystic acne?
The same four factors behind all acne, amplified: excess sebum, abnormal shedding inside the follicle, overgrowth of Cutibacterium acnes, and inflammation. Androgens drive sebum production, which is why cystic acne often tracks with hormonal cycles, PCOS or puberty.
Genetics strongly influence severity, and stress, high-glycaemic diets, occlusive products and picking at lesions all make it worse. Squeezing a cyst pushes the contents deeper and reliably increases scarring.
What ingredients are best for cystic acne?
Cystic acne genuinely warrants a dermatologist – oral treatment is often needed. Alongside that, topical retinoids are the most useful over-the-counter active, because they work on the plug before it ruptures.
Benzoyl peroxide reduces bacterial load, azelaic acid calms inflammation and post-acne marks, and niacinamide helps redness without irritation. Keep the rest of the routine gentle and barrier-focused – harsh scrubs and drying alcohol make deep lesions angrier. Take our Skin Quiz.
