In summer, hot and humid weather creates an environment where sebaceous glands overproduce oil, leading to a high risk of severe acne breakouts for oily and acne-prone skin. Without proper intervention, excess oil combined with dead skin cells and dirt will clog hair follicles, leading to massive inflammatory acne. Therefore, establishing a scientific, minimalist skincare routine suitable for oily and acne-prone skin is the "golden key" to keeping skin smooth and clear during summer.

1. What is oily and acne-prone skin? Identifying characteristics

Oily and acne-prone skin is characterized by overactive sebaceous glands, evidenced by a thick, greasy surface and enlarged pores. Sebum primarily accumulates in the T-zone (forehead, nose, chin) and on both cheeks. Excessive oil buildup not only dulls the skin and makes it look less vibrant when exposed to UV rays but also creates an ideal anaerobic environment for C. acnes bacteria to thrive, leading to a diverse range of imperfections:

• Non-inflammatory acne: Hidden acne (deep under the epidermis, making the skin surface rough to the touch), whiteheads (in closed pores), and blackheads (in open pores, oxidized upon contact with air).

• Inflammatory acne: Red inflammatory acne, pustules (with white pus heads), papules, and cystic acne (large lesions, deep in the dermis, containing a lot of pus and causing pain).

2. The core reasons why oily and acne-prone skin clogs more easily in summer

Understanding the root causes helps us easily build an effective summer skincare routine. The formation of oily and acne-prone skin is influenced by both internal factors:

• Summer climate: The hot and humid weather typical of Vietnam signals sebaceous glands to overproduce oil. When excess oil is continuously secreted, it combines with fine dust from the environment, easily clogging hair follicles.
• Hormonal imbalance: A sudden increase in hormones like Androgen strongly stimulates the activity of sebaceous glands. This is a common reason during puberty, for women during their menstrual cycle, or during pregnancy.
•  Unhealthy lifestyle: Staying up late, lack of sleep combined with a diet high in sugar, spicy, and greasy foods increases systemic inflammation, making acne worse and harder to improve.
• Unsuitable skincare products: Arbitrarily picking at acne or over-exfoliating with chemical exfoliants can damage the skin's surface, weakening its protective barrier. Products containing high concentrations of alcohol or fragrances also risk irritating sensitive skin.

3. Suggested scientific skincare routine for oily and acne-prone skin

3.1. Morning skincare steps for oily and acne-prone skin

Step 1: Gentle facial cleanser

Start your day with a gentle, deep cleanse using a facial cleanser with a pH of 4-6.5, free from harsh detergents. This step helps release accumulated sebum overnight, unclog pores without stripping the skin's natural moisture barrier, preventing the skin from overproducing oil during the day.

Step 2: Toner/Lotion

Immediately after drying your face, apply a thin layer to instantly rebalance moisture, help cool the skin, and contribute to limiting excessive oil production. Using a toner at this step also helps soften the skin, acting as a perfect base to help the sunscreen filter in the next step spread evenly and adhere better to the skin.

Step 3: Broad-spectrum sunscreen suitable for oily and acne-prone skin

This is a crucial step in your morning routine. Oily and acne-prone skin in summer must always be protected by broad-spectrum sunscreen with an SPF of 30 or higher. Prioritize milky or light gel sunscreens that have good oil-controlling properties and are free of heavy oil bases to comprehensively protect the skin from UV rays while keeping the skin surface dry and smooth all day long.

3.2. Evening skincare steps for oily and acne-prone skin

Step 1: Gentle makeup remover

Even if you don't wear makeup, removing it in the evening is essential to eliminate waterproof sunscreen filters, fine dust, and accumulated sebum. For oily and acne-prone skin in summer, prioritize gentle Micellar technology makeup removers, which help deep clean while minimizing friction damage to the skin's surface.

Step 2: Deep cleansing without causing tightness

Facial cleanser helps completely remove remaining impurities in the hair follicles. For summer, prioritize gel cleansers that cleanse well but maintain natural moisture, avoiding the phenomenon of dry and tight skin that causes sebaceous glands to overproduce oil.

Step 3: Gentle toner/Treatment product

After cleansing, use a toner to stabilize the skin's natural pH, soothe red areas, and soften the stratum corneum, preparing the skin for optimal absorption of active ingredients. Choose an alcohol-free toner to avoid irritation.

Additionally, you can incorporate specialized products for oily and acne-prone skin. In a scientific skincare routine, this is considered an important step in controlling oil glands, reducing clogging, and preventing inflammatory breakouts. Choose products based on the active ingredient mechanism and acne condition.

Active ingredients suitable for oily and acne-prone skin include: BHA/AHA, Benzoyl Peroxide, Azelaic acid, Retinoids. Regardless of the active ingredient used, you should balance the frequency and concentration suitable for your skin condition.

Step 4: Use a lightweight serum

Prioritize water-based serums that absorb quickly to provide suitable nutrients for the skin (such as Niacinamide, Panthenol, or Vitamin C) without feeling heavy or suffocating.

Step 5: Moisturizing cream to lock in moisture and strengthen the skin barrier

Often, there's a mistaken belief that oily skin doesn't need moisturizer in the summer. In reality, when skin lacks water, the body reacts by producing more oil to compensate. Therefore, choose lightweight, water-based moisturizers to protect the epidermal barrier throughout the day.

4. oh!oh! products suitable for oily and acne-prone skin

4.1. Exfoliating and Deep Cleansing Toner oh!oh! BHA 2% Toner : b

It is an ideal balancing solution for oily to acne-prone skin, thanks to its specialized BHA formula (1.5% Salicylic Acid + 0.5% Betaine Salicylate). Its oil-soluble properties penetrate deep into each hair follicle, dissolving and thoroughly removing dead skin cells and accumulated sebum – the core cause of hidden acne and blackheads.

4.2. Oil Control and Brightening Serum oh!oh! Skin Health Serum

With a synergistic formula of 20% Niacinamide and 2% Acetyl Glucosamine, it strictly controls sebaceous gland activity, soothes inflammation, and strengthens the skin barrier. Its lightweight, fast-absorbing texture is suitable for oily skin prone to clogging.

4.3. Multi-functional Skin Repair Cream oh!oh! Cellular Corrective Cream

Considered a perfect summer moisture lock, it helps strengthen the skin's biological barrier against environmental aggressors, resulting in firm and radiant skin. In addition to enhancing the skin's barrier function and regulating oil production, this cream contains 5% Calamine (a mixture of Zinc Oxide & Ferric Oxide) to instantly soothe and quickly reduce redness, irritation, or sunburn caused by intense UV exposure in summer.

4.4. Lightweight, breathable, broad-spectrum anti-aging sunscreen oh!oh! RK Defense Sunscreen

This product uses a broad-spectrum filter system with smart protective film technology, ensuring a continuous and even sunscreen layer, optimally protecting the skin from UVA/UVB rays, blue light, infrared radiation, and environmental pollution, which are leading causes of photoaging. Especially, its natural pink tint gently brightens, correcting dull skin to become instantly fresh, radiant, and full of life.