Your Skin Routine, Explained by an MD Dermatologist: What to Use, When & Why

Cleanser. Serum. Moisturizer. Sunscreen.

Sounds simple, right?

But then come the questions:

Which cleanser should I use? Do I really need a serum? Should moisturizer be used on oily skin? How much sunscreen is enough? Can I use multiple active ingredients together?

With so many skincare products and trends around us, building a routine can become confusing very quickly.

So let's simplify it.

We asked an MD Dermatologist to break down a practical skincare routine in simple language — what each step does, why you need it, and how to choose products according to your skin.

First: Your Skincare Routine Doesn't Need 10 Products

A good skincare routine is not about having a shelf full of products.

It's about getting the basics right.

Your routine can be as simple as:

CLEANSE → TREAT → MOISTURIZE → PROTECT

That's the foundation.

Everything else depends on your skin type, skin concern and individual needs.

 Dermatologist's Note
“Don't build your routine around how many products you can use. Build it around what your skin actually needs.”

Step 1: Cleanse — Start With Clean Skin

Your cleanser is the first step because it removes things that accumulate on your skin throughout the day.

Think:

Oil + sweat + dirt + sunscreen + makeup + environmental impurities

But here's something important:

Clean skin should not mean tight, dry or uncomfortable skin.

If your face feels extremely tight immediately after washing, your cleanser may be too harsh for your skin.

A simple example:

If you have oily skin, you may think:

“The more my cleanser removes oil, the better.”

Not necessarily.

Your skin still needs a healthy barrier. Over-cleansing can leave your skin feeling dry or irritated.

Which Cosderma cleanser should you choose?

Oily / Acne-Prone Skin
→ Cosderma Salicylic 2% Cleanser

Dry / Sensitive Skin
→ Cosderma Gentle or Hydrating Cleanser

Uneven Skin Tone
→ Cosderma Kojic 2% Cleanser

Looking for a daily active cleanser?
→ Cosderma Niacinamide 3% Cleanser

The goal isn't to choose the strongest cleanser. It's to choose the right one for your skin.

Step 2: Serum — Treat Your Skin Concern

Now comes the step that gets the most attention in skincare: serums.

But what exactly is a serum?

Simply put:

A serum is a targeted step in your routine designed around specific skin concerns.

Think of it this way:

Cleanser → cleans

Serum → targets

Moisturizer → hydrates & supports the barrier

Different ingredients have different purposes.

Need hydration?

Look for ingredients such as Hyaluronic Acid.

Hyaluronic acid is a humectant that helps attract and retain water, helping the skin feel more hydrated and plump.

Concerned about uneven skin tone?

Ingredients such as niacinamide, alpha arbutin, vitamin C and kojic acid are commonly used in skincare routines targeting uneven pigmentation and skin tone.

Want skin-repair focused care?

Ingredients such as PDRN and hyaluronic acid are used in certain skin-repair and hydration-focused formulations.

A Cosderma option:

Cosderma Hyaluronic Serum

A simple choice when your routine is focused on hydration.

For more targeted routines, Cosderma also offers options such as:

PDRN + HA Skin Revive Serum

and

ExoExpert Brightening Serum

 Dermatologist's Note
“Don't start five different serums at once. Introduce products gradually. Your skin doesn't need to be overwhelmed to improve.”

Step 3: Moisturizer — Yes, Even If You Have Oily Skin

This is one of the biggest skincare misconceptions:

“My skin is oily, so I don't need moisturizer.”

Actually, oily skin can still need hydration.

Your skin produces oil and holds water — these are not the same thing.

A moisturizer can help support hydration and the skin barrier while reducing moisture loss.

What should you look for?

Hyaluronic Acid
Helps attract and retain moisture.

Ceramides
Help support the skin barrier.

Emollients
Help soften and smooth the skin.

Think of your skin barrier like a wall.

A healthy wall helps keep what's inside protected.

Your skin barrier works in a similar way — helping retain moisture and providing protection from external irritants.

Over-cleansing, excessive exfoliation and using too many irritating products can make the skin barrier uncomfortable.

Cosderma Skin Repair Moisturizer

Formulated with hyaluronic acid and ceramides, it can be incorporated into a daily routine focused on hydration and barrier support.

For people focusing on uneven skin tone, Cosderma also offers a Skin Lightening Moisturizer formulated with ingredients including niacinamide, arbutin, glutathione and vitamin C.

Step 4: Sunscreen — The Step You Shouldn't Skip

Let's make this very simple:

If you are serious about skincare, take sun protection seriously.

UV exposure can contribute to:

• Tanning
• Uneven pigmentation
• Premature signs of skin aging
• Sunburn
• Long-term skin damage

And if you're using products to improve pigmentation but regularly skipping sunscreen, you're making it harder for your routine to do its job.

 Dermatologist's Note
“Think of sunscreen as protection for the progress you're trying to make with the rest of your skincare routine.”

What does SPF 50 mean?

SPF primarily indicates protection against UVB radiation, which is strongly associated with sunburn.

What does PA+++ mean?

The PA rating indicates the level of protection against UVA radiation, which is associated with tanning and photoaging.

How much sunscreen should you use?

A practical guide for the face and neck is the two-finger method.

Most importantly, apply enough product to cover the exposed areas properly.

And remember:

Sunscreen is not only for beach days.

Daily sun protection is important, particularly if you're outdoors or exposed to daylight regularly.

Cosderma Gel Base Ceramide Sunscreen SPF 50 PA+++

A daily sunscreen option designed to provide high SPF protection while incorporating ceramide-focused skincare.

Your Simple Morning Routine

If you're a beginner, don't overcomplicate it.

 MORNING

1. Cleanser
↓
2. Serum (if required)
↓
3. Moisturizer
↓
4. Sunscreen

That's your foundation.

Your Simple Night Routine

 NIGHT

1. Cleanser
↓
2. Targeted Serum / Treatment
↓
3. Moisturizer

Your night routine is where you can focus more specifically on your skin concern.

But remember:

You don't have to use an active ingredient every night.

Your skin also needs a routine that it can tolerate.

What Should Your Routine Look Like?

Not everyone's skin needs the same products.

Here's a simple way to think about it.

 Oily & Acne-Prone Skin

Morning

Cleanser → Moisturizer → Sunscreen

Night

Cleanser → Suitable treatment → Moisturizer

Cosderma options:
Salicylic 2% Cleanser + appropriate treatment + moisturizer + sunscreen

 Dry & Dehydrated Skin

Morning

Gentle/Hydrating Cleanser → Hyaluronic Serum → Moisturizer → Sunscreen

Night

Gentle/Hydrating Cleanser → Hyaluronic Serum → Moisturizer

Cosderma options:
Hydrating Cleanser + Hyaluronic Serum + Skin Repair Moisturizer + Sunscreen

 Uneven Skin Tone / Pigmentation

Morning

Cleanser → Brightening Serum → Moisturizer → Sunscreen

Night

Cleanser → Targeted treatment → Moisturizer

The important part?

Consistent sun protection.

Because pigmentation care isn't just about what you apply at night — protecting your skin during the day matters too.

5 Skincare Mistakes Your Dermatologist Wants You to Avoid

  1. Using too many active ingredients.More actives don't automatically mean faster         results.Your skin can become irritated when you layer too many potentially irritating    products.

Aggressive scrubbing can irritate acne-prone skin.

Especially if you're concerned about tanning, pigmentation or premature skin aging.

Give your routine time.

Constantly switching products makes it difficult to understand what is actually working for your skin.

Your friend's skin, your favourite influencer's skin and your skin may have completely different needs.

Skincare should be personal.

How Long Does It Take to See Results?

This is where patience matters.

Some products may make your skin feel more hydrated relatively quickly.

But concerns such as acne, pigmentation and signs of skin aging generally require consistent care over time.

Results can depend on:

• Your skin type
• Your specific concern
• Severity
• Ingredients used
• Frequency of use
• Sun exposure
• Your individual skin response

Don't expect overnight transformation.

Instead, focus on building a routine that you can follow consistently.

Your Skin Doesn't Need More. It Needs the Right Routine.

If you remember only four things from this article, remember these:

1. Cleanse

Keep your skin clean without unnecessarily stripping it.

2. Treat

Choose ingredients based on your actual skin concern.

3. Moisturize

Support hydration and your skin barrier.

4. Protect

Make sunscreen part of your morning routine.

Build Your Routine With Cosderma

Your skincare routine doesn't have to be complicated.

Whether your focus is hydration, acne-prone skin, uneven skin tone, skin barrier support or daily sun protection, start with the basics and choose products according to what your skin actually needs.

Explore the Cosderma range and build a routine that's right for your skin.

Cleanse. Treat. Moisturize. Protect.

Cosderma — Skincare, Simplified.

A final reminder from your dermatologist

“Healthy skin isn't about perfection. It's about understanding your skin, taking care of it consistently and knowing when your skin needs professional advice.”

If you have persistent, painful, severe or scarring acne, significant pigmentation, a rash, or a skin problem that isn't improving, consult a qualified dermatologist rather than trying to manage it only with cosmetic skincare products.