Sofwave vs Thermage
Sofwave heats a band in the middle of the skin with ultrasound. It is one session of about 30 to 45 minutes, and it is aimed at fine lines, crepey texture and mild slackness. Thermage heats a whole block of skin with radiofrequency instead. It is the older device, it is the one most often used around the eyes, and it is also a single session. Neither one lifts a jowl much, and no published trial has compared them.
What it is
Several transducers fire together and warm a band about 1.5 mm below the surface. Nothing enters the skin.
Current passes through the tissue to a pad on your back. The skin's own resistance to that current is what makes the heat.
How the heat is placed
The energy stops in the middle layer of the skin, where collagen sits.
Radiofrequency warms a volume rather than a layer. A cooling spray protects the surface while the depth heats.
What you should see
Finer lines, a tidier neck, a slightly cleaner jaw edge. The change is modest.
Crepey skin, mild slackness and wrinkles, including the thin skin of the eyelids.
What it will not do
What it feels like
The handpiece cools the surface as it works. Numbing cream is usual and is often enough.
The tip is stamped across the area. Each pulse is a burst of heat with a spray of coolant before and after. Uncomfortable rather than dreaded.
How long until it works
Some early smoothing in the first month, then a slow build.
Collagen contracts a little on the day, then rebuilds slowly.
How long it lasts
Downtime
Pinkness for an hour or two, sometimes mild swelling for a day.
Redness and slight swelling that settle within hours. Make-up on the same day is normal.
Cost
The at-home or drugstore version
Home ultrasound wands sold for tightening put a small fraction of the energy into the surface. They never reach the layer this device heats.
They warm the top of the skin a little. The clinic device drives current through the full thickness with a return pad, which is a different scale of heating altogether.
Who each suits
Ultrasound or radiofrequency
Both work by heating your own tissue on purpose: The heat is a controlled injury. Your body repairs it by laying down new collagen, and that is what firms the skin over the following weeks.
Sofwave puts its heat in one layer: Ultrasound is aimed at a band in the middle of the skin, and the surface above it is cooled. That makes it predictable and keeps recovery to nothing.
Thermage heats a volume instead: Current spreads through the tissue, so the warming is broader and less precise. That is a weakness if you want a specific depth, and a strength if the whole area needs firming.
The eye area is Thermage's own ground
Thermage is the one routinely used on the eyelids: It has been treating that thin skin for years, using a smaller tip made for the area.
Sofwave is not an eyelid treatment: It is used on the brow, face and neck, and the eyelid itself is not part of what it is offered for.
That single fact settles a lot of choices: If crepey upper lids are the reason you are reading this, Thermage is the one to ask about.
Neither one gives you a lift
Both are firming treatments, not lifting ones: They tighten skin. They do not move the deeper structure that holds a jawline in place.
Ultherapy is the device aimed at that deeper layer: Even it gives a modest lift, not a surgical one.
Sagging that you can grip is a surgical problem: A clinic that promises either of these will fix it is overselling.
The risks worth knowing
Both are low risk in trained hands: Redness, swelling and tenderness are common with either, and settle within a day or so.
Thermage's known complications come from heat going too deep: Burns and blistering are rare. So is fat loss under the skin, which leaves a small dent. There is no good published figure for how often that happens.
Sofwave's list is a surface one: Redness, small raised welts, and rarely a burn if the settings are wrong.
Who holds the handpiece matters more than which machine it belongs to: Both devices depend on the operator choosing sensible settings and covering the area properly.
Before you book
Ask how many pulses are planned, not just which areas. Under-treating is the most common reason people see nothing.
Ask whether the quote is for one session or a plan.
Ask to see the clinic's own before-and-after photos, taken in the same light and at the same angle.
Tell the clinic about a pacemaker, an implanted defibrillator or metal near the treatment area before booking Thermage. Radiofrequency current and metal do not mix well.