15% Azelaic Acid Purifying Lotion

STEP 1

Pat skin dry after cleansing.

STEP 2

Dispense 1–2 pumps as needed, spread evenly over the full face.

STEP 3

Smooth the product onto facial skin with fingertips, massage gently until fully absorbed.

Q1: Does SOUNDER ONE 15% Azelaic Acid Purifying Lotion need to be used away from light?

A: This product contains no photolytic or photosensitive ingredients. No light avoidance is required, and it can be safely used during daytime.

Q2: Can sensitive skin use this product?

A: All skin types can gradually build tolerance via spot testing and the SCT Short Contact Therapy method. You may use it comfortably once tolerance is established. If severe persistent discomfort occurs, discontinue use and consult a dermatologist promptly.

Q3: Can it be layered with other acid ingredients such as retinoic acid and AHA?

A: Layering with other acidic ingredients is not recommended, as it may overstimulate the skin and worsen irritation. Tranexamic acid is an exception — it is an amino acid rather than an acid exfoliant.

Q4: How to distinguish skin intolerance from allergic reaction?

A: Signs of intolerance include stinging, itchiness, redness and flaking. These irritant symptoms can be eased by building skin tolerance and reinforcing moisturizing & soothing care. Allergy symptoms to watch for: swelling, blisters, pus discharge and persistent severe itchiness. If these occur, stop using the product immediately and seek medical advice.