Why Does Facial Pigmentation Return? Understanding Melasma

Brown patches on the cheeks or forehead may darken in summer and fade in winter. Pigmentation that improves with a product can also return months later. In melasma, the aim is to reduce uneven colour while managing the conditions that trigger further darkening. Correct diagnosis comes first.

Is every facial dark patch melasma?

Melasma usually causes brown or grey-brown patches in a similar distribution on both sides of the face. The cheeks, forehead and upper-lip region can be affected. Pigment-producing melanocytes respond to influences including light and hormones. Pregnancy, some hormonal medicines and familial tendency may contribute. [1]

A single brown spot, a post-acne mark and widespread uneven colour are not the same diagnosis. Distribution, onset, products and medicines are assessed; tools such as dermoscopy may help. One lightening product chosen from a photograph is not suitable for all pigmentation. [2]

Why can it darken again?

Less visible pigment does not mean the tendency to produce it has disappeared. Renewed light exposure, continuing hormonal triggers and irritating skincare may contribute. Recurrence does not by itself show that the earlier approach never worked. Maintenance and triggers should be reviewed together. [1,3]

Why is the SPF number not enough?

Broad-spectrum UVA/UVB protection matters. Visible-light protection can also be relevant in melasma. Tinted sunscreens containing iron oxides may be considered; a tinted cosmetic is not automatically equivalent. The product’s sunscreen function, protection and composition should be checked. [3]

In an eight-week randomised study involving 68 people with melasma, both sunscreen groups used SPF 50 or higher and both also received hydroquinone. The group using UV plus visible-light protection through iron oxides showed greater pigmentation improvement than the UV-only group. This supports attention to sunscreen characteristics alongside treatment; it does not establish that any sunscreen alone clears melasma. [4]

Everyday care

• Use a broad-spectrum SPF 30 or higher product regularly. Reapply at least every two hours outdoors and after swimming or sweating; include shade and a hat.
• Notice burning or stinging. Simplifying irritating routines with your doctor may be preferable to layering multiple strong active products.
• Choose a tinted sunscreen that suits your skin tone and can be applied adequately and consistently.

Starting several new products at once also makes it harder to identify an irritant. [3]

How is treatment selected?

Pigmentation characteristics, sensitivity, earlier treatment and circumstances such as pregnancy guide selection. Prescription pigment-reducing products or combinations may be considered, with individual frequency, duration and follow-up. Unsupervised long-term use of an online mixture is not a substitute for a clear initial and maintenance plan. [2]

A randomised trial of 233 people compared a particular hydroquinone, tretinoin and low-potency corticosteroid combination with placebo over eight weeks. Melasma improved more with the combination, but adverse effects were more frequent, mostly mild. This result concerns one formula and study population; it does not mean everyone should use the same mixture or duration. [5]

Preparing for review

Bring product names, the onset history and your responses to earlier treatment. Unfiltered photographs taken periodically in consistent light and position may help. Ask when review should take place, what to do about irritation and how care should continue after the pigment fades. Understanding maintenance matters alongside starting treatment.

Diagnosis and selection of treatment require an individual medical assessment.