? How do microneedles work? Two main technical approaches
Microneedles are mainly divided into two categories, with slightly different mechanisms of action:
Non-energy microneedles (such as Dermapen, roller microneedles): They simply use extremely fine needles to create microchannels on the skin surface. These microchannels, on the one hand, directly stimulate the dermis layer, triggering wound repair signals and prompting fibroblasts to produce new collagen; on the other hand, they open up efficient absorption channels for subsequent applied or introduced nutrients (such as PRF, exosomes, growth factors), allowing them to reach the deep layers and exert their effects.
Energy microneedles (such as gold microneedles/radiofrequency microneedles): This is an upgraded version of microneedles. After the needle penetrates the skin, the needle tip releases radiofrequency energy at a specific depth, generating a controllable thermal effect. This "mechanical + thermal energy" dual stimulation can more powerfully prompt immediate collagen contraction and initiate a more significant collagen regeneration and remodeling process, especially suitable for improving skin laxity and deeper acne scars.
? ️ What is a standard microneedle treatment like?
A complete treatment usually consists of the following steps:
Pre-treatment: 1-2 weeks before the treatment, it is recommended to stop using products that are irritating, such as retinoids and high-concentration alpha-hydroxy acids, and to strictly protect the skin from the sun to stabilize the skin condition.
Treatment process:
Cleaning and anesthesia: After thoroughly cleaning the skin, apply a local anesthetic for about 30-40 minutes to reduce discomfort.
Main procedure: The doctor will adjust the needle depth (usually adjustable from 0.5mm to 3.5mm) and energy parameters based on the treatment area and problem, and perform the operation evenly on the face. The entire process lasts about 20-40 minutes.
Immediate post-treatment care: After the treatment, the skin will show diffuse redness and a burning sensation. Cold compress (15-30 minutes) is usually applied immediately to calm and soothe the skin.
⏱️ Timeline of recovery and effect presentation
The effects of microneedling are gradual, following the physiological repair process of the skin:
Inflammatory phase (0-48 hours after treatment): The skin becomes red, slightly swollen, has a burning sensation, and there are pinhole marks. This is a normal acute reaction.
Healing phase (3-7 days after treatment): The redness and pinholes gradually fade, and there may be tiny crusts on the skin surface, which feels like "sandpaper". At this point, the epidermis has basically healed.
Initial improvement phase (1-4 weeks after treatment): As collagen begins to proliferate, you can start to observe initial improvements in skin texture, pores, and oiliness.
Collagen remodeling golden period (1-6 months after treatment): This is the key stage for effect manifestation. The dermis continuously undergoes a large amount of new collagen production and remodeling, and the filling of acne scars, the reduction of fine lines, and the improvement of skin firmness become increasingly obvious. For acne scar problems, the effect peak usually appears at 3 to 6 months after treatment.
? How many times are needed? How often is the interval?
The number of treatment sessions and the interval vary depending on the treatment purpose and the equipment:
Treatment goal Recommended number of sessions Interval
Large pores, fine lines, skin improvement 2-3 sessions as one treatment cycle Interval of 4-6 weeks
Depressed acne scars (pore pits) 3-5 sessions or more as one treatment cycle Interval of 6-8 weeks, or even 1-3 months
Hair loss (scalp microneedling) 12 sessions as one treatment cycle Usually 1 session per week
After completing a basic treatment cycle, it is usually recommended to have 1-2 maintenance treatments per year to consolidate the effects.
? The "golden partner" of microneedles: combined therapy
The microchannels created by microneedles are an excellent "drug delivery system", and they are often used in combination with regenerative materials to enhance the effect:
Microneedles + PRF (Platelet-Rich Fibrin): This is the common application method of PRF dermal rejuvenation that you have heard of before. The microneedles open the channels, and PRF, as a source of autologous growth factors, is introduced deep into the skin. Its fibrin scaffold can slowly release growth factors, and it is superior to microneedles alone in improving skin quality and acne scars.
Microneedles + Exosomes: Exosomes are signal carriers between cells, and their combined use in promoting skin cell regeneration and collagen synthesis shows promising prospects. A 2026 randomized controlled study showed that radiofrequency microneedles combined with topical extracellular vesicles improved wrinkles better than using radiofrequency microneedles alone at 12 weeks.
⚠️ Key precautions and risks
Post-treatment care points:
Within 24 hours: Avoid contact with contaminated water in the treatment area. You can use sterile normal saline for cleaning.
Within 3 days: Do not use makeup or sunscreen products that require removal before the needle holes are completely closed.
Within 1 week: Avoid strenuous exercise, saunas, hot springs, hot baths, and avoid spicy and irritating foods and alcohol.
Within 1 month: Strict sun protection is crucial. Prioritize the use of hard sun protection methods such as hats and masks to prevent post-inflammatory hyperpigmentation.
Main risks and contraindications:
Microneedles are generally safe, but there may be temporary redness, swelling, and slight bleeding points. A few people may develop pigmentation (especially in individuals with darker skin tones) or infection.
The following groups are not suitable or should be cautious when undergoing microneedle treatment:
Those with active inflammation or infection on the skin (such as acute acne, herpes outbreak, eczema).
Those with a keloid-prone constitution.
Those with coagulation disorders or those taking anticoagulant medications.
Pregnant or lactating women.
Those with active infection or tumor in the treatment area, or those with a cardiac pacemaker (for radiofrequency microneedles).
In summary, microneedle treatments are a highly flexible basic skin treatment platform that can be used alone or as a carrier to combine with PRF, exosomes, and other components to specifically address multiple issues ranging from skin quality improvement to scar repair. The choice of specific treatment plan is recommended to be evaluated by a professional doctor based on your skin condition.
