What if hydroquinone treatment does not relieve dark patches on skin?

Darkening can follow acne, irritation, injury, hormonal change, sun exposure, or a medicine, and different causes respond differently. Continued ultraviolet or visible-light exposure can keep pigment active. Irritation from the cream or from combining several active products may also deepen discoloration and make progress harder to judge.

Some marks fade slowly after the original trigger has stopped. A clinician may need to check whether the patches have a pattern that fits melasma, post-inflammatory hyperpigmentation, or another condition before recommending continued treatment.

Use hydroquinone only as directed and do not extend treatment, increase application, or combine it with peeling agents without medical advice. Protect exposed skin from sunlight with shade, clothing, and a suitable sunscreen. Keep a simple record of product use, irritation, and changes in colour. Stop and seek advice if you develop marked burning, swelling, blisters, or unusual blue-black darkening.

Arrange a dermatology review when patches persist, spread, recur, or appear without an obvious trigger. Seek prompt assessment for a single changing spot, bleeding, crusting, persistent pain, or a patch that looks different from the others. Sudden widespread colour change with other illness symptoms also needs medical attention.

Ask what type of pigmentation is present, whether the product is irritating your skin, how long treatment should continue, which ingredients to avoid together, and how to prevent the patches from returning.