How Many Fat Dissolving Injection Sessions Do You Need? Jumy's Summer Glow-Up, and How I Count Them

“How many sessions will I need?” is usually the second question I hear about fat-dissolving injections, right after the price. I'm Dr. Hyunji Kim, director of Delphic Clinic in Sinnonhyeon, Gangnam. I trained at Korea University Medical Center and I consult and treat international patients myself, and visitors ask this because they're counting flights, not just needles. Jumy (@jumybear) lists fat-dissolving injections in her summer TikTok alongside Titanium, ONDA and Rejuran. I already walked through how her whole plan was sequenced on her Instagram case; this page answers one narrower question: how I decide the number of sessions, the spacing, and when ONDA changes that count.

Medically reviewed · Dr. Hyunji Kim · October 26, 2026

How many fat dissolving injection sessions does a face need?

Asking how many fat dissolving injection sessions you need is the right question, but the honest answer starts with “it depends on what I find.” Jumy's caption lists the injection among four treatments and doesn't say how many sessions or which areas, so I won't guess at hers.

For a small facial area, such as fullness along the jawline or under the chin, some people see a change they're happy with after one session. More often I plan a short series and decide on the next session only after seeing how the first one settles.

If you want the full picture of her trip, I explained how Jumy's face-and-body plan was sequenced on her Instagram case. Here I'm only counting sessions.

Why the body usually takes more visits than the face

A tummy, flank or upper arm holds far more fat than a jawline, and each body session covers a larger surface. One session rarely makes a dramatic difference there, so I tell body patients upfront to expect a series.

• Small facial pockets: often a short series, sometimes one session is enough for a subtle change
• Double chin: depends on how much is fat and how much is loose skin, which is why I pinch before I plan
• Abdomen, flanks, arms: usually several sessions, because the area and the volume are larger
• Mixed fat and laxity: the injection alone may not finish the job, which is where a device comes in

How far apart should sessions be?

I space sessions a few weeks apart. In the first week the area is often swollen and can even look fuller, so judging too early leads to over-treating. The real change in shape shows gradually over the following weeks.

That's why I'd rather look at you again before adding volume. My week-by-week before-and-after timeline for fat-dissolving shows what each stage usually looks like.

Does adding ONDA change the count?

Sometimes, yes. ONDA uses Coolwaves microwaves to heat deeper fat while tightening the skin, and its 7mm handpiece is the one that reaches fat. On our menu, ONDA plus a fat-dissolving injection is a combination I use when fat and slight laxity sit together.

ONDA itself is usually planned as 1–3 sessions depending on the area and goal, with results building over several weeks to 2–3 months. Combining them doesn't remove the need for a series; it lets each session do more of the work, so the plan can be shorter than injections alone.

If you're weighing the two, my notes on whether 40 kJ of ONDA is enough explain how I choose the energy level.

When one more session won't help (and when I'd say not yet)

• The fullness is loose skin or muscle, not fat. More injections won't tighten skin.
• Your weight is still changing. I'd rather treat a stable shape than chase a moving one.
• The last session is still swollen. I wait until it settles before deciding anything.
• You're pregnant or breastfeeding, or have an active skin infection in the area.

What a course of fat-dissolving injections costs

These are example menu prices per session, not what Jumy paid. International patients pay exactly what Korean patients pay. Because the answer is a series, multiply by the sessions I recommend after examining you, not by the first visit alone.

Fitting a series into one or two trips

1. 1

   Before you fly

   Send us a photo of the area on WhatsApp, front and side. I'll tell you whether I expect one session, a short series, or a device to be part of it.

2. 2

   Visit one

   Free 1:1 consultation with me, then same-day treatment if it suits you. English and Chinese interpreters are on site, near Exit 3 of Sinnonhyeon Station.

3. 3

   Between visits

   Keep your weight stable and take a photo after a few weeks in the same light. That photo tells us whether a second session is worth booking.