What should you know about saline subcision?

Subcision uses a small needle or cannula under local anaesthetic to separate fibrous bands that pull a depressed scar downward. The release may allow the surface to look more even as healing occurs. Saline is a sterile fluid; it does not replace the mechanical release and is not a filler. Bruising, swelling, tenderness, and temporary unevenness can follow the procedure.

The method is most relevant to selected rolling or tethered scars. Deep boxcar scars, ice-pick scars, active acne, infection, and scars with a different cause may need another approach or a staged plan.

Tell the clinician about medicines that affect bleeding, allergies, active skin disease, previous abnormal scars, and any recent procedures. Follow instructions about cleansing, makeup, exercise, and blood-thinning medicines. Keep small entry points clean, avoid pressing or massaging the area unless instructed, and use sun protection while bruising or redness remains.

A plan may combine subcision with [Acne Scar Laser Treatment](/treatments/laser-and-energy/acne-scar-laser-treatment/). For the procedure itself, read about [Subcision](/treatments/surgical-dermatology/subcision/) and ask why combination treatment is being considered.

Contact the clinic for worsening pain, expanding swelling, increasing warmth, pus, fever, persistent bleeding, or skin colour change. Sudden severe pain, marked firmness, or changes in sensation need prompt assessment. Seek urgent help for breathing difficulty or facial swelling after any injected or anaesthetic product.

Ask whether your scar is tethered, what saline contributes, which scars will be treated, and whether another treatment should come first. Clarify expected bruising, wound care, review timing, and signs of infection.