Doctor’s Advice: What is Filler? Dr. Saetawut Lertlukpreecha explains everything you need to know before getting injected.

Hello, I’m Dr. Saetawut Lertlukpreecha, a physician specializing in aesthetic and dermatological treatments.

Today, I’d like to introduce you to “Filler” — a dermal treatment that many people are curious about, but often misunderstand.

This article will help you understand fillers correctly before making any decisions.

What is Filler?

Filler is a substance used to restore volume and reduce deep wrinkles or facial lines. It’s also commonly used to enhance facial features such as the chin, cheeks, and under-eye area.

In medical practice, the most widely used fillers today are made of Hyaluronic Acid (HA) —

a substance naturally found in the human body that helps retain moisture and fill in spaces beneath the skin.

Key Benefits of Filler Injections

• Immediate results after injection

• No downtime or recovery required

• Highly flexible and natural-looking results

• Can be dissolved if unsatisfactory or in case of complications

Popular Areas for Filler Injections

Area	Purpose
Under-eye	Reduce dark circles and hollowness
Nasolabial folds	Soften deep smile lines
Chin	Create a longer, more defined chin profile
Cheekbones	Add volume and a youthful appearance
Temples / Forehead	Restore balance and harmony to facial contours
Lips	Add fullness and volume
Jawline	Define and sculpt the face shape

How Long Does It Last?

On average, filler results last between 8–18 months, depending on:

• The type of filler used (molecular size, crosslinking)

• Injection site, since high-movement areas break it down faster

• Post-injection care

• The patient’s individual metabolic rate

Important Things to Know Before Getting Filler

Before Injection:

• Avoid Vitamin E, alcohol, and aspirin for at least 24 hours

• Inform your doctor of any allergies to HA or pre-existing conditions

• Research the clinic and confirm the authenticity of the products used

After Injection:

• Avoid touching, pressing, or massaging the injected area

• Drink plenty of water to help the filler last longer and enhance plumpness

Safety Precautions

• Do not inject if pregnant or breastfeeding

• Ensure the filler is FDA-approved and legally certified

• Do not receive injections from unlicensed individuals

• Choose an experienced doctor, especially for high-risk areas like the under-eye or nose

Doctor’s Recommendation

“Filler delivers immediate and visible results, but safety must always come first.”

I, Dr. Saetawut Lertlukpreecha, want my patients to understand that

beauty isn’t just about “filling to the max,” but about strategic planning based on facial anatomy —

so the outcome looks balanced, natural, and truly flattering.

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Summary

Filler is a great non-surgical option to enhance facial features and restore volume.

But thoughtful decision-making is essential — from choosing the right doctor, to using authentic materials, and following proper aftercare.

Being informed will help you achieve beautiful, safe, and truly worthwhile results.