Key takeaways
- Hydroquinone is used to treat excess pigmentation, but the cause of a dark patch should be identified first. AAD melasma guidance.
- Sun protection is part of melasma treatment, not an optional extra once a cream starts working. Dermatology guidance.
- Hydroquinone can cause irritation and, in some cases, ochronosis, a potentially persistent dark discolouration. FDA safety warning.
- Irritating skin care can itself leave dark marks, particularly in darker skin tones. AAD guidance on dark spots.
After the cause of pigmentation has stopped, a mark a few shades darker than the surrounding skin may take 6 to 12 months to fade, according to the AAD. Deeper pigment can take years. Melasma may also persist for years or return after improvement. Treatment starts with finding the cause and controlling further irritation and sun exposure. Dark-spot guidance, Melasma guidance.
Is it melasma or a mark left by inflammation?
The history of the patch and an examination help distinguish them; continuing acne or eczema also needs treatment.
A dermatologist may examine facial patches with a Wood’s lamp or dermatoscope to assess how deeply the pigment extends. Sometimes a skin biopsy is needed to distinguish melasma from another condition. Post-inflammatory hyperpigmentation can follow acne, eczema, psoriasis, a healing insect bite or irritation from a skin or hair product. Any continuing inflammation needs treatment too; a lightening cream alone will not address it. Melasma diagnosis, dark-spot guidance.
Before the appointment, note when the marks appeared, what preceded them and which products you have tried. Photographs and the actual product packaging are more useful than a list of remembered brand names.
Are hydroquinone and combination creams interchangeable?
No: a hydroquinone-only cream and a cream containing a retinoid and steroid are different treatments.
| Product type | What needs checking |
|---|---|
| Hydroquinone-only cream | Concentration, treated area and planned duration |
| Triple-combination cream | All three ingredients, especially the specific steroid |
| Unlabelled “brightening” mixture | Ingredient identity and whether it can be assessed at all |
The AAD describes a triple cream containing hydroquinone, tretinoin and a corticosteroid. Hydroquinone targets excess pigment, tretinoin is a retinoid and the corticosteroid reduces inflammation. This description does not identify the formula in every brand. Treatment overview.
In particular, do not assume that Melacare Forte and another triple-combination brand contain the same steroid. Check the ingredient panel with the pharmacist. The word “combination” cannot establish equivalent strength, tolerability or suitability for longer use.
How long can hydroquinone be used safely?
Agree on a course and review date with the prescriber. No on-and-off cycle guarantees freedom from side effects.
The FDA notice identifies Tri-Luma as a prescription product for short-term treatment of facial dark spots associated with moderate-to-severe melasma. That US approval does not establish a safe duration for another hydroquinone cream. Agree on the review date, stopping point and next treatment with the prescriber. If pigmentation is not improving, reassess the diagnosis and product before extending the course. FDA treatment scope.
The FDA issued warning letters to 12 companies on 19 April 2022 about unapproved over-the-counter hydroquinone lightening products. It reported rash, facial swelling and ochronosis, which may be permanent. The notice concerns the US market; those adverse effects remain relevant to safety discussions elsewhere. FDA notice.
New blue-grey darkening, marked burning or swelling calls for medical advice, not stronger application. Keep the tube so that the clinician can see exactly what was used.
What helps keep treatment on track?
Use sun protection and a routine that does not irritate your skin.
The AAD recommends tinted sunscreen with iron oxide to help protect against visible light, as well as SPF 30 or higher, broad-spectrum protection and water resistance. Iron oxide may appear among the inactive ingredients because it protects against visible light rather than ultraviolet radiation. Reapply sunscreen every two hours and after swimming or sweating, and wear a broad-brimmed hat.
Avoid adding scrubs or strong exfoliants to speed treatment. The AAD advises stopping a product that burns or stings and choosing gentler skin care, such as fragrance-free products. New irritation can create more dark marks. AAD dark-spot advice.
For related decisions, read the tretinoin strength guide and isotretinoin acne guide. They discuss different treatments, not products to layer onto an existing prescription.
Do and don’t
Do:
- Confirm the diagnosis and record all ingredients in your treatment.
- Agree on a review date and a plan for ongoing pigment control.
Don’t:
- Use a steroid-containing cream as an indefinite facial moisturiser.
- Treat burning, excessive peeling or new darkening as evidence of success.
