The Dr.Pen A9 is designed to help improve the appearance of uneven skin texture, enlarged pores, hyperpigmentation, dull skin tone, stretch marks, loose skin, and sun damage. It is also commonly used for scalp care to support healthy hair growth. Results vary by individual and depend on consistent use, needle depth, and cartridge selection.

The A9 is a focused MTS (Microneedling Transdermal System) device built for skin care, running at up to 15,000 RPM across 6 speed levels with a 700mAh battery that supports both wired and wireless use. The M8S shares the same A9 cartridge format and is interchangeable. The A6S uses a different cartridge system and operates at a lower RPM range, making it better suited for users newer to microneedling. If skin care precision and power are your priorities, the A9 is the stronger choice.

The A9 offers adjustable needle depth from 0.0mm to 2.5mm. For delicate areas such as around the eyes and lips, stay between 0.25mm–0.5mm. For the forehead and cheeks, 0.5mm–1.0mm works well for surface-level texture improvement. Depths above 1.5mm are generally reserved for licensed professionals targeting specific concerns on thicker skin areas like the jawline or scalp. Always start shallow and increase gradually as your skin builds tolerance.

The A9 uses its own dedicated A9 cartridge line, which is also compatible with the Dr.Pen M8S. Available options include 12-pin, 18-pin, 36-pin, round nano, and square nano cartridges. The 18-pin cartridge features a 0.18mm diameter with an N-shape channel design for enhanced serum absorption. Nano cartridges are the gentlest and best for daily skin maintenance, while higher pin-count cartridges like the 36-pin cover larger areas more efficiently. Note: A9 cartridges are not compatible with A6, A6S, M5, M7, or A1.

For standard microneedling sessions (depths above 0.5mm), once every 3–6 weeks is recommended to allow your skin adequate recovery time. If you are using the nano cartridge at 0.0mm–0.25mm depth, you can use it up to once per week for gentle texture maintenance and improved serum absorption. Listen to your skin — if redness or irritation persists longer than 48 hours, extend the interval between sessions.

Sensation varies by needle depth, speed setting, and individual pain tolerance. At shallow depths (0.25mm–0.5mm), most users report only mild tingling. At deeper settings (1.0mm+), some discomfort is normal. Applying a topical numbing cream (e.g., lidocaine-based) 20–30 minutes before use and wiping it off completely before starting can significantly reduce discomfort. Higher pin-count cartridges like the 36-pin also tend to feel more comfortable than lower pin-count options at the same depth.

Before: Cleanse thoroughly with a gentle, fragrance-free cleanser and pat dry. Apply a hydrating, non-active serum such as hyaluronic acid to the treatment area — this also acts as a glide medium for the pen. Avoid acids (AHAs, BHAs, retinol, vitamin C) for at least 24–48 hours prior. After: Apply a calming, barrier-supporting serum immediately post-session (hyaluronic acid or peptide serums work well). Avoid niacinamide, retinol, strong vitamin C, and exfoliating acids for 48–72 hours. Always apply broad-spectrum SPF 30+ the following morning.

Avoid using the A9 if you have active breakouts, open wounds, rosacea flare-ups, eczema, psoriasis, or any active skin infections in the target area. Do not use if you are pregnant, have a blood clotting disorder, are on blood thinners, or have undergone radiation therapy to the skin. Those with a history of keloid formation should consult a dermatologist before use. Remove all metallic jewelry from the treatment area before each session.

No — A9 cartridges are single-use only. Reusing a cartridge increases the risk of skin irritation, infection, and cross-contamination because needle tips dull after a single pass and cannot be fully re-sterilized. Before each new session, sterilize a fresh cartridge by soaking the needle tip in 70%+ isopropyl alcohol for 1–2 minutes, then allow it to air dry completely. Always wear clean gloves when handling cartridges, and dispose of used cartridges safely after every session.

Mild redness, warmth, and slight swelling immediately after a session are completely normal and typically resolve within 12–48 hours. Minor pinpoint bleeding at deeper depths (above 1.0mm) is also expected. You should consult a dermatologist if you experience prolonged redness lasting more than 72 hours, signs of infection (pus, increasing pain, fever), or an unexpected allergic reaction to any product applied post-session. Avoid picking at any flaking skin that may appear 2–3 days after deeper sessions.