Does HydraGentle change blackheads in pores? Research on the effects and limits of peeling

A small study found that peeling performed while cleansing with water flow improved the appearance of acne-prone skin[1]. Glycolic acid and salicylic acid peeling used in this procedure are listed in dermatology guidelines as one option for pore congestion[2]. However, within the scope of this review, we found no research examining whether enlarged pores become smaller.

What does HydraGentle do?

HydraGentle is a treatment that cleanses the skin with water flow while applying acid peeling to remove dead skin cells and pore debris, and then applies beauty ingredients. In research, similar procedures have been studied under names such as "HydraFacial"[1][3].

This type of treatment is characterized by removing dead skin without using abrasive particles[3]. Among the acids used, glycolic acid removes surface dead skin and evens out skin texture, while salicylic acid penetrates into pores and works on acne[4].

How effective is it for acne and pore congestion?

In acne-prone skin, improvements in appearance have been reported. In a study where 20 people with mild to moderate acne received 6 treatments every 2 weeks, those with "no or minimal acne" increased from 20% to 65% according to physicians' assessments[1].

Self-assessment also showed an increase from 5% to 55%[1]. However, this study had a small sample size, no comparison group, and also combined blue light therapy[1].

According to Japanese dermatology guidelines, glycolic acid and salicylic acid peeling are considered an option when standard treatments cannot be used for pore congestion (whiteheads and blackheads)[2]. Salicylic acid is reported to be particularly effective for pore congestion[5].

Is there an effect on pore enlargement and skin firmness?

Within the scope of this review, we found no studies measuring whether pore enlargement itself becomes smaller. In reports of combined glycolic and salicylic acid treatment, 70–80% of people reported reduced sebum shine and smoother skin[6].

In studies combined with antioxidant beauty serums, thickening of the skin's surface layer has been reported[3]. Many studies have shown that applying hyaluronic acid to skin often increases hydration[7]. However, none of these are results from studies of HydraGentle itself.

What about side effects such as redness or irritation?

Most common are temporary redness and irritation. In studies of similar treatments, lighter treatments showed minimal redness, and in stronger treatments, redness subsided within 2–5 days[3].

Glycolic acid peeling can cause temporary stinging, dryness, and scabbing, but is considered to have no long-lasting side effects[2]. Glycolic acid is also reported to cause more redness and skin peeling than other acids[5].

Rarely, it can lead to post-inflammatory hyperpigmentation or scarring[8]. People with darker skin tones are more likely to experience post-inflammatory hyperpigmentation[9]. Be sure to confirm sun protection measures after treatment in advance.

How do you choose between other peeling and treatments?

If you have a lot of inflammatory acne, the basic approach is to first consider standard treatments such as topical medications[2]. Peeling becomes an option when that treatment is not suitable or when you are concerned about pore congestion or skin texture[2][4].

Glycolic acid is suited to surface skin texture but may be insufficient for deep acne scarring[4]. Combining several acids may be more effective than using a single acid and may place less burden on the skin[5].

What should you confirm before treatment?

In consultation, ask about the following points:

Skin concerns: whether the focus is on pore congestion, inflammatory acne, or acne scarring[2][4]

Number of sessions: how many sessions and at what intervals[1]

Skin sensitivity: whether acid strength can be adjusted for sensitive skin or skin prone to post-inflammatory hyperpigmentation[5][9]

Other treatments: how to combine with treatments currently in use, such as topical medications[2]

Whether HydraGentle is right for your pores and acne cannot be determined from this article alone. During examination, have your acne type and skin sensitivity assessed, and confirm the combination with other treatments and the recommended number of sessions.