If you don't want filler, you can consider biostimulators such as PLLA, CaHA, PCL, or PDLLA to stimulate collagen production and gradually improve firmness or volume in some areas. PN/PDRN and skin boosters focus more on skin quality than immediate deep-fold filling. Other options include tightening devices, surgery to correct under-eye bags or reposition fat, and autologous fat transfer for suitable candidates. However, each method has its own indications, risks, and timeframe for results — no single method suits everyone.
This article is general educational information. Please have a doctor assess you before choosing any procedure.
ร่องแก้ม ร่องใต้ตา และแก้มตอบ ภาพรวมสาเหตุที่ต่างกัน
Can Nasolabial Folds, Tear Troughs, and Hollow Cheeks Be Treated Without Filler
In some cases, yes — but expectations must match the mechanism of the treatment. Hyaluronic acid (HA) filler is designed to add volume and shape contour fairly precisely, while biostimulators prompt the tissue to produce its own collagen, so change is gradual and cannot be expected to fill a deep fold as immediately or as predictably. Results depend on the substance, location, technique, skin health, and individual response.
The term "Bio" in marketing covers many different products — it is not a single standardized medical category. This article therefore separates substances by active ingredient and purpose, and does not lump PN, collagen stimulators, skin boosters, and hybrid fillers together as the same thing. Before choosing, have a doctor examine your face and check the registration/label valid for use in Thailand.
What Causes Nasolabial Folds, Tear Troughs, and Hollow Cheeks
A fold or hollow on the face is "a visible feature," not a diagnosis of the cause on its own. Age, genetics, bone structure, changes in fat and supporting ligaments beneath the skin, muscle movement, skin quality, weight change, and light/shadow can all contribute differently.
- Nasolabial folds: the crease from the side of the nose down toward the corner of the mouth may stand out due to changes in midface structure and the cheek with age, tissue descent, fat loss, or skin folds caused by facial expression — it should not be assumed that the fold itself must always be injected directly.
- Tear troughs (infraorbital hollows): shadowing under the eyes may come from the bony groove and tissue combined with thin skin, dark pigmentation, visible blood vessels, fat bags or fluid swelling, and laxity. Adding volume does not fix every cause, and in people with prominent bags/puffiness, adding material may make it look heavier or more swollen. Injecting around the eyes requires anatomical knowledge and assessment by a highly experienced doctor.
- Hollow cheeks: may relate to reduced deep fat volume, bone structure, genetics, weight loss, or age-related change. Thin, lax skin may deepen the shadow. The doctor must distinguish whether genuine volume is needed, or whether skin quality/firmness should be addressed instead, because particulate biostimulators do not create localized shape the way an immediate volumizing filler does.
How Many Types of Non-HA Injectables Are There
There is no fixed number, because the term "Bio" is used differently from clinic to clinic. For educational purposes, the main mechanisms can be grouped into 4 types of collagen biostimulator, plus 1 skin-quality-restoring group — 5 broad categories in total. Formulas and approved uses vary by product and country.
- PLLA — Poly-L-lactic acid: stimulates collagen gradually, used in some plans to improve firmness and address volume loss in the face. The effect is not immediate filling. May cause lumps or nodules if used inappropriately or if complications occur — should never be self-injected or dosed according to formulas found online.
- CaHA — Calcium hydroxylapatite: CaHA particles may provide some volumetric support while stimulating collagen, depending on the product and method of use. Use in delicate areas such as under the eyes is not suitable as a substitute for direct fold-filling, and it carries the same vascular-occlusion risk as other injectables.
- PCL — Polycaprolactone: a collagen-stimulating injectable whose properties/duration vary by formula and version. Products from different brands should not be assumed to share the same data, approved use, or duration — check the label and evidence for that specific product.
- PDLLA — Poly-D,L-lactic acid: another polymer group used in some collagen-stimulating formulas. Claims that it "can replace filler" must be considered by specific product version, location, and registration — not generalized across the entire group.
- PN/PDRN and skin boosters: aim to restore skin quality, hydration, smoothness, or elasticity according to the product's approved use. In general, they should not be expected to fill a deep fold or volume-depleted hollow cheek the way a filler does.
Note: some products are combination formulas or are marketed under names such as "hybrid/bioremodeling," so you should read the actual ingredients, approved use, product insert, and registration status rather than judging by the word "Bio" alone.
What Are the Options for Each Concern
ทางเลือกการดูแลร่องแก้ม ใต้ตา และแก้มตอบโดยไม่ฉีดฟิลเลอร์
Nasolabial folds: if there is volume loss/deficiency in the midface, the doctor may consider a biostimulator suited to the area to gradually add firmness and support. If the fold is caused by skin folding and laxity, certain tightening devices may help with firmness but will not restore lost volume. If the fold is related to significant laxity, surgical lifting options should be assessed for suitable candidates.
Under the eyes: thin skin or fine lines may be considered for skin-quality-focused treatments such as skin boosters/PN, without any guarantee of filling a deep trough. A trough from structure or volume loss requires assessment of both the midface and under-eye structure; options may include adjusting an adjacent area or appropriate volumizing, but particulate biostimulators are not a universal choice for direct under-eye injection. Fat bags or excess skin should be discussed with an ophthalmologist/plastic surgeon about surgery. Dark discoloration from pigment/vessels may be better addressed with cause-specific skin treatment and sun protection rather than adding volume.
Hollow cheeks: if there is clear volume loss, PLLA, CaHA, or some PCL/PDLLA formulas may help with gradual support and change in suitable candidates, though the predictability of volume and contour differs from HA filler. If you want a clear increase in volume, consult a doctor about HA filler or fat grafting, which carry their own risks and limitations.
The area around the eyes requires particular caution — injecting any substance on the face can cause vascular occlusion and severe complications. General information should never be used to decide your own injection site or technique.
Easy Comparison
| Method | Main Focus | Typical Onset | What to Know |
|---|---|---|---|
| HA filler | Adds volume/shapes contour in a specific area | Visible change immediately after treatment, though swelling/bruising can occur | Carries vascular-occlusion risk; some locations are not suitable for everyone |
| PLLA / CaHA / PCL / PDLLA | Stimulates collagen, gradually adds firmness/support in some plans | Gradual, several weeks to months depending on type | Not easily reversible like filler; risk of lumps/vascular occlusion |
| PN/PDRN / skin booster | Skin quality, hydration/fine lines depending on product | Gradual, may require a course of sessions | Does not replace filling a deep fold or fat bags |
| Tightening devices | Some degree of laxity and firmness | Gradual | Does not directly add missing volume |
| Surgery/fat transfer/autologous fat grafting | Under-eye bags, excess skin, or volume loss in suitable candidates | Depends on recovery and method | A procedure/surgery with its own risks and recovery period |
Safety and Recommendations Before Deciding
ข้อควรรู้และความปลอดภัยก่อนตัดสินใจฉีด biostimulator
Every type of injection carries risks of swelling, bruising, infection, lumps/inflammatory reaction, and the uncommon but serious risk of vascular occlusion. Choose a licensed doctor who understands anatomy and has an emergency response plan.
Before deciding:
- Ask for the full name of the substance and product, including the label/registration number used in Thailand
- Ask whether the purpose is to add volume, stimulate collagen, improve skin quality, or lift
- Have the doctor explain the realistic expected result, what it cannot do, the number of sessions, follow-up timeline, and options if side effects occur
- Disclose your history of filler/biostimulator/surgery, underlying conditions, medications, allergies, and pregnancy/breastfeeding
- Do not buy injectable material to inject yourself, and do not use price or the word "Bio" as an indicator of safety
If you have unusually severe pain, pale or dark mottled skin, blistering, rapidly worsening symptoms, blurred vision, abnormal vision, or neurological symptoms, contact a medical facility/emergency service immediately.
Frequently Asked Questions
If I don't inject filler, can "Bio" fill the area instead?
Some biostimulators can gradually add firmness and volume in certain areas, but they do not give the exact same result as HA filler in every respect, and they are not suitable for every location — especially under the eyes. A doctor must assess first.
Which is best for nasolabial folds?
It depends on whether the fold comes from midface volume loss, skin laxity, or folding. The choice should not rely on the name of the procedure alone — the doctor must examine your face and explain the options.
Can I inject Bio under the eyes instead of filler, and can PN fill a deep trough there?
It should not be assumed that it can substitute directly. Particulate collagen-stimulating substances are not a universal choice for the tear trough. PN/skin boosters may focus on skin quality but do not fully address fat bags or structural troughs. The main expectation should be skin quality and fine lines according to the product's approved use — not a volumizing effect equivalent to filler.
When do biostimulator results appear, and how many sessions are needed?
Generally gradual, over several weeks to several months, varying by substance, product, treatment plan, and the individual. The number of sessions and duration depend on the product and treatment plan — do not apply one brand's schedule or timeframe to another; follow the label and information of the actual product used.
Can injection cause lumps or blockage?
Yes. Every type of injection carries risks of swelling, bruising, infection, lumps/inflammatory reaction, and the uncommon but serious risk of vascular occlusion. Choose a licensed doctor who understands anatomy and has an emergency response plan.
Can a tightening device be used instead of injection?
It may help with some degree of laxity, but it does not directly replace missing volume. Some people may benefit from combining several methods after assessment.
Who should avoid or postpone injection?
Those who are pregnant/breastfeeding, have an infection or inflammation in the treatment area, a history of allergy to the ingredients, or a condition/medication affecting treatment should disclose everything to the doctor and follow the contraindications on that product's label.
I've had filler before — can I have Bio added, and can Bio be done together with filler or a tightening device?
Some people can plan several types of procedures, but you must disclose the type, location, and timing of previous injections, and have the tissue assessed first — do not inject over an area without knowing what substance is already there. Combined treatment may be considered case by case, but the sequence and spacing depend on the product, location, and risk — the doctor should plan this; you should not do several things at once simply because it's a promotion.
Who is more suited to a biostimulator than filler?
Those who want a gradual change and have an appropriate indication may consider it, but those who want immediate, localized filling may have different goals. The doctor should explain the options and risks without guaranteeing a result.
How should I prepare before consulting about nasolabial folds, tear troughs, or hollow cheeks?
Bring a list of medications/underlying conditions and your history of previous procedures, disclose any swelling, allergies, or weight changes, and state your goals, including that you do not want filler.
Summary
There are several injectable procedure groups that help stimulate collagen or improve skin quality, but no single "Bio" product group can replace filler at every location and for every cause — especially under the eyes, where the skin is thin and the structure is complex. Choosing a treatment must start with diagnosing whether the hollow comes from structure, volume loss, skin laxity, fat bags, pigmentation, or several factors together.
If you are not ready for filler but are interested in other options, you can book a consultation with a doctor at Orianna Clinic to assess the cause and plan care that suits your needs.
Orianna Clinic "Beauty in your own"