Acid Treatments - How to Choose Combination Therapies for Your Skin Type?

Combination acid treatments are a professional skincare approach that brings together carefully selected active ingredients or different procedures within a single treatment or a planned series of appointments.

Unlike a single peel based on one specific formulation, a combination treatment can address several skin concerns at the same time.

In practice, a combination treatment may involve:

• A combination of acids selected for specific skin concerns and applied according to a professional treatment protocol.
• A multi-step treatment using active ingredients in a specific sequence.
• A peel combined with another professional skincare procedure, where the skin’s condition and the methods used allow.
• A personalised treatment programme in which different procedures are carried out over a series of appointments.

For example, skin with excess sebum production may also show post-inflammatory hyperpigmentation and signs of dehydration. Treatment selection should take all of these concerns into account, rather than focusing solely on intensive exfoliation.

Please note: a combination treatment does not necessarily mean a stronger treatment. The aim is to match the treatment to the skin’s needs, rather than maximise the number of active ingredients.

The same acid may not be suitable for two people with a similar skin type. Oily skin can also be dehydrated, while mature skin may be sensitive and prone to irritation.

Before choosing a procedure, a skincare specialist should therefore consider both the skin type and its current condition.

Relevant factors include:

• The condition of the skin’s protective barrier and the level of irritation.
• The presence of blackheads, whiteheads, inflammatory lesions or hyperpigmentation.
• Skin phototype and susceptibility to post-inflammatory hyperpigmentation.
• Medications, retinoids and active ingredients used in the home skincare routine.
• Previous professional skincare treatments.
• UV exposure.
• Expected results and the ability to follow aftercare recommendations.

In some cases, the skin’s protective barrier needs attention before starting a more intensive course of treatment. In others, a single, gentler peel may be sufficient.
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An individual assessment helps reduce the risk of adverse reactions and supports better treatment planning.

Acid treatments are used in professional skincare to address a range of aesthetic concerns. Their suitability depends on the type of peel, the ingredients used and the skin’s current condition.

Common concerns for which an appropriately selected acid treatment may be considered include:

• Hyperpigmentation — including uneven skin tone, sun spots and post-inflammatory pigmentation.
• Blackheads, whiteheads and excess sebum production — in oily and blemish-prone skin.
• Certain forms of acne — as a complementary part of an appropriate care or treatment plan, following a skin assessment.
• Fine lines and signs of photoageing — where the aim is to improve the skin’s appearance and texture.
• Uneven, rough skin texture — associated, among other factors, with a build-up of dead skin cells.
• Superficial post-acne marks — particularly post-inflammatory pigmentation and certain shallow textural irregularities.
• Dull skin with an uneven tone — where carefully selected exfoliation may help refresh its appearance.

Not every acid treatment is suitable for all of these concerns. For example, treatments targeting pigmentation may differ from those used for blackheads, whiteheads or signs of ageing.

Oily skin is often characterised by excess sebum production, a tendency to develop blackheads and whiteheads, and visible pores. Inflammatory lesions and pigmentation left behind by acne may also occur.

Selected chemical peels may help reduce blackheads and whiteheads and improve the skin’s appearance. Depending on the specific concern, options may include salicylic acid, mandelic acid or other carefully selected ingredients.

However, active acne does not always mean a peel is appropriate. Where there is significant inflammation, deep nodules or a suspected condition requiring medical treatment, a dermatology consultation should take priority.

Hyperpigmentation can develop as a result of UV exposure, hormonal changes or skin inflammation. Carefully selected acid treatments may help even out skin tone and reduce the appearance of some forms of superficial pigmentation.

The choice of procedure depends on the cause and depth of the pigmentation. Melasma, in particular, requires caution, as unsuitable treatment may make pigmentation worse. Consistent sun protection is an essential part of caring for skin with hyperpigmentation.

As skin ages, it may gradually lose elasticity and develop fine lines, uneven texture and changes in tone. Selected chemical peels may help improve skin texture and reduce the appearance of superficial signs of photoageing. Depending on individual needs, options may include alpha hydroxy acids (AHAs) or specialised professional skincare procedures.

Realistic expectations are essential. A chemical peel cannot replace treatments designed to address deep wrinkles or a significant loss of firmness.

Dry or dehydrated skin may feel rough or tight, show flaking and be more prone to irritation. Not all skin with these concerns needs a peel. If the skin barrier is compromised, restoring it should be the priority.

Once the skin’s condition has improved, a specialist may consider gentler ingredients, such as lactic acid or selected PHAs, where appropriate.

For reactive skin, the priority is to identify the causes of sensitivity and assess tolerance to active ingredients. Certain gentler procedures may be considered after a suitable assessment. This does not mean that every peel is safe for skin prone to redness and visible capillaries.

Treatment may need to be postponed if there is active redness, irritation or a flare-up of a skin condition.

AHAs — Improving Texture and Tone

Alpha hydroxy acids (AHAs) include glycolic, lactic and mandelic acid. They are used in procedures aimed at improving smoothness, reducing the appearance of minor textural irregularities and evening out skin tone.

Their effects depend on the formulation, concentration, pH and application method. Individual AHAs are therefore not interchangeable in every situation.

Salicylic acid, classified as a BHA, is used in treatments for oily skin and skin prone to blackheads and whiteheads. Its properties can make it useful in carefully selected peels targeting concerns associated with excess keratin build-up and sebum production.

Polyhydroxy acids (PHAs), including lactobionic acid, are sometimes used in gentler professional skincare formulations. This does not mean they carry no risk of irritation. Their use still requires an assessment of the skin’s condition and an appropriate choice of product.

Azelaic acid is used in the care of blemish-prone skin and skin with an uneven tone. Professional procedures may also use ferulic, phytic, succinic or pyruvic acid.

However, the name of the acid alone does not determine the outcome. The complete formulation, how it is used and an appropriate assessment of the person receiving the treatment all matter.

According to Green Tea Spa’s treatment offering, a single acid treatment session may include a selection of one to three peels tailored to the skin concern, followed by a soothing mask.

Other procedures available include PRX-T33, PQ Age and Easy TCA.

There is no single number of sessions that suits every skin type.

With gentle, superficial procedures, a change in the skin’s smoothness or appearance may be noticeable after one appointment. Concerns such as hyperpigmentation, post-acne marks or uneven texture often require a longer-term approach.

The number of appointments depends on factors such as:

• The nature and severity of the concern.
• The condition of the skin barrier.
• The types of peels used.
• The skin’s response to previous procedures.
• Consistency of the home skincare routine.
• Adherence to UV protection recommendations.

More intensive exfoliation does not always produce a better result. Treatment planning should also allow enough time for the skin to recover.

Carefully selected acid treatments may help improve the skin’s smoothness, tone and overall appearance. Their effectiveness and safety depend on an appropriate assessment, a suitable treatment choice and adherence to aftercare recommendations.

Combination treatments are about thoughtfully selecting methods that address the skin’s actual needs, rather than using as many active ingredients as possible.

If you are unsure which peel or combination treatment is right for you, an individual skin assessment is a good place to start.