Pigmentation is one of the most commonly discussed skin concerns because it affects the appearance of skin tone. Understanding skin pigmentation helps explain why uneven skin tone may develop and how it can be managed through daily care and protection.

At its core, pigmentation refers to certain areas of the skin appearing darker than others. This variation in colour is a natural biological response of the skin and occurs when pigment-producing cells, called melanocytes, produce higher levels of melanin in response to internal or external triggers.¹

What Causes Pigmentation and Uneven Skin Tone

Melanin is a natural pigment that helps protect the skin by absorbing ultraviolet (UV) radiation from sunlight. When skin is exposed to UV rays, melanin production can increase as a defence mechanism, which may result in visible dark patches over time. ¹

Here are some of the most common causes:

Sun Exposure: Sun exposure is one of the leading contributors to uneven skin tone and visible dark spots. Repeated exposure to UV rays without adequate protection may stimulate excess melanin production. ¹

Hormonal Changes: Hormonal changes, such as those occurring during pregnancy or hormonal treatments, may influence melanin activity and lead to uneven pigmentation in some individuals. ¹

Inflammation and Injury: Inflammation or skin irritation, including from acne or minor skin injuries, may contribute to temporary dark marks as the skin recovers. This is commonly referred to as post-inflammatory hyperpigmentation.¹

Ageing Skin: As skin ages, natural cell renewal slows, which can make uneven pigmentation more noticeable over time.²

Environmental Stressors: Environmental factors such as pollution may contribute to oxidative stress, which can affect overall skin appearance.³

How Pigmentation Appears Over Time

Pigmentation often develops gradually. Changes are usually subtle at first and may become more noticeable with continued exposure to triggering factors such as sunlight or irritation.¹

In some cases, pigmentation may appear after skin trauma, such as acne marks, and can take weeks to fade as the skin completes its natural renewal cycle.⁴

Can Cleansing Help With Pigmentation?

While cleansing alone does not change melanin levels, gentle daily cleansing can help maintain surface clarity and support a more even-looking complexion.

Using a face wash designed for uneven skin tone can help remove surface buildup that may make dark areas appear more prominent. Gentle cleansing also helps reduce irritation, which can otherwise worsen uneven tone.

Managing Pigmentation: Practical Tips

• Use broad-spectrum sun protection daily to limit UV-related pigmentation.
• Cleanse gently twice daily to maintain surface clarity.
• Avoid picking or irritating inflamed areas.
• Consider targeted skincare ingredients under professional guidance.

With consistent care and sun protection, the appearance of uneven skin tone can be reduced over time.

Ref: 
1. https://pmc.ncbi.nlm.nih.gov/articles/PMC10304091/ 
2.https://www.sciencedirect.com/science/article/pii/S2950306X24000189 
3. https://www.skinfinityderma.com/protect-skin-from-pollution/ 
4. https://www.ncbi.nlm.nih.gov/books/NBK559150/