Is hydroquinone safe for melasma?
Hydroquinone can work well for melasma and post-inflammatory pigmentation, but open-ended use without a time limit or follow-up is not a good idea. DermNet says that if there is no benefit after 3 months it should be stopped, and notes that about 70% of melasma patients saw clearing or reduced pigment with twice-daily use for 3 months, and that improvement could be kept in about 50% with twice-weekly use. These are reference figures, not a guarantee for every strength or every skin.
Key numbers
- 3 months — An important decision point
- ≈70% — Reported melasma response
- ≈50% — Keeping the improvement
- 1 cm / 24 hours — Small test area
What is the concern with long, unsupervised use?
The issue is not that hydroquinone is clinically forbidden, but that long unsupervised use can irritate and increase pigmentation, and rarely may be linked to exogenous ochronosis, a permanent bluish darkening, especially with prolonged use or unsuitable strengths/products. So Dr. Yousef treats it as part of a plan with a start, a review point and maintenance, not as a permanent lightening cream.
What makes treatment more successful?
- Treating the underlying trigger, such as acne or inflammation, rather than lightening the mark while the cause continues.
- Reducing irritation, because inflammation itself can increase post-inflammatory pigmentation.
- Good sun protection; in melasma, visible-light protection with an iron-oxide tinted sunscreen may help.
Key takeaways
- 3 months is a clear review point; no benefit by then means stopping and reassessing.
- It works well in suitable cases, but that is not a reason to use it without limits.
- Irritation control and sun protection are part of successful pigment treatment, not just the strength.
Pigmentation and Melasma: How to Treat Them Without Making Them Worse