Why Your Skin Is Still Oily in Singapore Even After You Wash Your Face
By 11am, your foundation has melted. The T-zone is shining. Blotting papers are a daily essential. You’ve tried mattifying products, oil-free everything, and washing your face more frequently — and somehow the oil just keeps coming.
Living in Singapore with oily skin can feel like fighting an unwinnable battle. The equatorial climate — 28–32°C year-round, 70–80% humidity — creates conditions that significantly amplify sebum production and keep the skin in a constant state of surface oiliness.
But oily skin is not just a cosmetic inconvenience. It contributes to enlarged pores, acne breakouts, and long-term textural changes. And managing it effectively requires understanding what’s actually driving the oil — because not all oily skin has the same cause.
Sebum is produced by sebaceous glands, which are attached to hair follicles throughout the skin. It has genuine protective functions — lubricating the skin surface, maintaining the acid mantle, and providing some antimicrobial protection.
Problems arise when sebaceous glands produce more sebum than the skin needs. The excess accumulates in pores, contributes to blocked follicles, and creates the shine and slick texture associated with oily skin.
Several factors drive excess sebum production:
Sebaceous gland activity is substantially genetically determined. If your parents had oily skin, you likely will too.
Male hormones — present in both sexes — are the primary stimulus for sebaceous gland activity. Higher androgen levels, or increased sebaceous gland sensitivity to androgens, directly increases sebum output. This is why oily skin worsens during puberty (androgen surge) and why hormonal conditions like PCOS can drive severe oiliness.
Temperature and humidity both increase sebum flow. Sebum is more liquid at higher temperatures and flows to the skin surface more readily. Singapore’s climate essentially keeps this tap running continuously.
Cortisol (the stress hormone) increases androgen activity, indirectly stimulating sebaceous glands. Chronic stress is a significant and underrecognised driver of persistent oiliness.
Here’s the counterintuitive part: over-washing, harsh cleansers, and over-exfoliation disrupt the skin’s oil-water balance. The skin compensates by producing more sebum. Many patients with oily skin are actually making it worse with their cleansing routine.
“I see patients every week who are stripping their skin clean five times a day and wondering why their skin is still oily,” says Dr. Low Chai Ling, Medical Director, SW1 Clinic. “When you repeatedly remove all the oil from the skin surface, the sebaceous glands read that as a deficit and produce more. Gentler cleansing, less frequently, typically results in less oiliness over time — not more.”
No skincare routine can eliminate the effect of climate on oily skin. What it can do is manage the impact.
At 80% humidity, the skin’s transepidermal water loss (the rate at which water evaporates from the skin surface) slows significantly. This means the skin doesn’t dry out as quickly — but it also means the surface of the skin remains in a moist environment that keeps sebum liquid and visible.
Heat directly vasodilates blood vessels in the skin and increases metabolic activity in sebaceous glands. The combination of heat and humidity in Singapore creates a sustained stimulus for sebum production that simply doesn’t exist in temperate climates.
This means Singapore-specific product choices and routines are genuinely different from those appropriate in London or New York. Lighter formulations, better sebum absorption, and heat-resistant SPF are all more relevant here.
A gentle, non-stripping cleanser used twice daily — morning and evening — is appropriate for oily skin. Adding extra cleansing sessions during the day removes sebum temporarily but stimulates more production.
Gel or foam cleansers with mild surfactants are better than soap-based cleansers, which are typically too stripping.
Topical niacinamide (vitamin B3) has well-documented sebum-reducing properties. A study in the found that niacinamide significantly reduced sebum production compared to placebo after regular use [1]. It’s also anti-inflammatory, pore-minimising, and safe for daily use.
Topical retinoids normalise skin cell turnover and reduce sebaceous gland activity over time. Regular use produces meaningful reductions in oiliness — though results develop over weeks to months.
Product selection matters significantly in Singapore. Look for:
- formulations (won’t block pores)
- — essential but should not add to oiliness
- for makeup wearers
For patients with more significant sebaceous overactivity, several clinic treatments can help.
— certain laser wavelengths reduce sebaceous gland activity directly, producing longer-term reductions in sebum output.
— regular salicylic acid peels reduce sebum in pores and temporarily reduce pore size appearance. at SW1 Clinic uses this principle.
— the thermal energy delivered to the dermis can reduce sebaceous gland activity while simultaneously stimulating collagen, improving overall skin quality alongside sebum reduction.
“For patients with significantly oily skin that isn’t adequately controlled with topicals, in-clinic treatments provide a meaningful additional layer of control,” says Dr. Chua, SW1 Clinic. “The combination of a good home routine and periodic clinic treatments produces much more sustainable results than either alone.”
For some patients, excessive oiliness is associated with a hormonal condition that needs to be addressed medically. PCOS, androgen excess, and thyroid dysfunction can all manifest with abnormal sebum production.
If oiliness is severe, associated with irregular periods, hirsutism (excess hair growth), or weight changes, or if it developed relatively recently, it’s worth discussing with a doctor to rule out underlying hormonal causes.
Clara, 27, had struggled with extremely oily skin since her teens. She’d been cleansing five times a day and using multiple mattifying products with limited effect.
After consultation, she was advised to reduce her cleansing to twice daily with a gentle cleanser, start niacinamide serum, and undergo a course of salicylic acid peels. “Washing less felt completely counterintuitive,” she said. “But within three weeks, my skin was visibly less oily than it had been in years. The combination of the routine change and the treatments made a real difference.”
Oily skin in Singapore is a genuine challenge — but it’s a manageable one. With the right routine and, where needed, clinical support, sebum production can be meaningfully reduced and the skin brought to a comfortable, sustainable balance.
Book a consultation at to discuss your skin concerns.
[1] Draelos, Z. D., Matsubara, A., & Smiles, K. (2006). The effect of 2% niacinamide on facial sebum production. , 8(2), 96–101. [2] Zouboulis, C. C. (2004). Acne and sebaceous gland function. , 22(5), 360–366. [3] Clarys, P., & Barel, A. (1995). Quantitative evaluation of skin surface lipids. , 13(4), 307–321. [VERIFY CITATION]
