What is hydroquinone in skincare?
Hydroquinone is a phenolic compound that suppresses melanin production by inhibiting tyrosinase, the key enzyme in the pigment pathway. It has been the dermatological reference standard for skin lightening for decades.
Its regulatory status varies widely. In the United States prescription strengths are 4%; in the European Union and several other markets it is banned from cosmetics entirely and available only through a doctor.
What skin concerns does hydroquinone treat?
It is used for melasma, solar lentigines, post-inflammatory hyperpigmentation and other stubborn pigment that has not responded to gentler agents. Meta-analyses of topical melasma treatments consistently place it among the most effective options.
It is intended for short courses – typically three to six months. Prolonged unsupervised use carries a risk of ochronosis, a blue-black discolouration that is very difficult to reverse, which is why safety reviews stress medical supervision.
What ingredients are best paired with hydroquinone?
It is most effective in the classic triple combination with a retinoid and a mild corticosteroid, prescribed and monitored by a dermatologist. Daily broad-spectrum SPF is mandatory, or the pigment simply returns.
If hydroquinone is unavailable or unsuitable, azelaic acid, tranexamic acid, alpha arbutin, kojic acid, niacinamide and vitamin C are the evidence-backed alternatives – slower, but safe for long-term 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.
