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Gachisan Station InMode Side Effects: How Much Bruising from FX and Heat from Forma Is Acceptable?

Hongdae Dermatology Skin Clinic 弘大美丽石医院 · ✦뷰티스닥터 합정역✦ · August 7, 2026

Hello. I’m Kim Ha-won from Beauty’s Doctor. ​ When looking for reviews of InMode, some people say that FX caused significant bruising, ​ while others say that Forma only felt warm...

AI translation notice

This page is an English translation of a Korean Naver Blog archive entry. For exact wording and source context, verify against the Korean archive original and the original Naver post.

Clinic: Hongdae Dermatology Skin Clinic 弘大美丽石医院

Original post date: August 7, 2026

Translated at: August 17, 2026 at 9:57 AM

Medical note: This translation does not guarantee medical accuracy or suitability for treatment decisions.

Gachisan Station InMode Side Effects: How Much Bruising from FX and Heat from Forma Is Acceptable? image 1

Hello.

I’m Kim Ha-won from Beauty’s Doctor.

When looking for reviews of InMode,

some people say that FX caused significant bruising,

while others say that Forma only felt warm

and caused no particular discomfort,

so it can be confusing to know which is typical.

The two modes above

belong to the same category of radiofrequency devices,

but they deliver energy differently,

so the reactions after treatment should also be considered separately.

When assessing InMode side effects,

it is more important to first check whether the symptoms decrease over time

or instead become worse than to focus on the name of the symptom.

3-Line Summary

  1. FX uses suction and radiofrequency together,

so circular marks, bruising, or tenderness may occur.

  1. Forma may leave redness, warmth,

and temporary dryness

as heat is delivered to the skin.

  1. If pain becomes severe

or blisters, oozing, or changes in skin color appear,

do not wait—contact a medical institution and report your condition.

  1. What is the difference between FX and Forma?

Gachisan Station InMode Side Effects: How Much Bruising from FX and Heat from Forma Is Acceptable? image 2

Forma delivers bipolar radiofrequency

through a tip that remains in contact with the skin

while checking the surface temperature and adjusting the heat.

During the treatment, you may feel as though

a warm device is being rubbed over your skin,

and redness or warmth may remain immediately afterward.

FX, on the other hand, uses negative pressure to draw the skin into the tip

before delivering radiofrequency energy.

Because suction is added,

you may feel the skin being pulled or a brief prickling sensation,

and circular red marks or bruising may appear.

Therefore, rather than grouping Forma and FX together

simply as InMode treatments,

you should first distinguish whether your current concern is skin elasticity

or the thickness of the tissue beneath the chin or in the lower face,

and then determine the areas to be treated.

  1. Which reactions are common?

Gachisan Station InMode Side Effects: How Much Bruising from FX and Heat from Forma Is Acceptable? image 3

After FX, suction marks and bruising,

along with tenderness when pressed or mild swelling,

may temporarily appear.

After Forma, redness and a slight warm sensation,

as well as temporary tightness or dryness,

may persist for a short time.

Gachisan Station InMode Side Effects: How Much Bruising from FX and Heat from Forma Is Acceptable? image 4

These reactions generally

show a pattern of decreasing in extent and intensity

over time.

However, the recovery rate

may vary depending on skin thickness, the treatment area, energy settings,

and an individual’s tendency to bruise.

Rather than comparing your condition with the duration mentioned in online reviews,

check whether the redness is lighter than it was yesterday

and whether the tenderness and warmth are decreasing.

  1. How should you view concerns about hollowing of the cheeks and burns?

Gachisan Station InMode Side Effects: How Much Bruising from FX and Heat from Forma Is Acceptable? image 5

When searching for InMode side effects,

concerns about cheek hollowing and burns

are particularly noticeable.

For people with little facial fat or existing hollow areas,

the areas where FX is applied

need to be divided more carefully.

A plan intended to define the area beneath the chin

cannot be viewed in the same way

as a plan that broadly treats the central cheeks.

Gachisan Station InMode Side Effects: How Much Bruising from FX and Heat from Forma Is Acceptable? image 6

If a particular area continues to look hollow

even after the swelling has subsided,

or if the difference between the two sides becomes more pronounced,

take photos to document and check the condition.

Because Forma also uses heat,

caution is needed if one area feels unusually hot

and the pain gradually worsens.

If blisters and oozing,

Gachisan Station InMode Side Effects: How Much Bruising from FX and Heat from Forma Is Acceptable? image 7

or white or dark reddish-black

changes in skin color appear,

do not dismiss them as simple warmth.

Also contact the medical institution where you received the treatment

if numbness spreads

or your facial expressions feel different from usual.

  1. What should you check before and after treatment?

Gachisan Station InMode Side Effects: How Much Bruising from FX and Heat from Forma Is Acceptable? image 8

Before treatment,

tell the medical staff about any medications you are taking and allergies,

as well as whether you have dermatitis or any wounds.

Information about the areas and timing of

recent fillers and thread lifting,

as well as other radiofrequency, ultrasound, or laser treatments,

is also necessary.

If you have an implanted electrical device or metal implant in your body,

or if you are pregnant,

confirm in advance whether the treatment can be performed.

While warmth and redness remain after treatment,

postpone hot showers, saunas, and Korean-style heated rooms for a while.

It is also better to wait until the skin has calmed down

before resuming strenuous exercise and alcohol,

as well as massages that apply strong pressure to the face and scrubs.

Wash your face gently with lukewarm water

and care for the recovering skin with a mild moisturizer and sunscreen.

In conclusion

Gachisan Station InMode Side Effects: How Much Bruising from FX and Heat from Forma Is Acceptable? image 9

Information about InMode side effects

can feel more confusing if the reactions to FX and Forma are not distinguished.

FX may make bruising and marks more noticeable because suction is added,

while Forma may make redness and warmth relatively more noticeable

because it delivers heat.

Gachisan Station InMode Side Effects: How Much Bruising from FX and Heat from Forma Is Acceptable? image 10

What matters is not whether a reaction occurs,

but whether it decreases over time

or, conversely, whether the pain and affected area become more extensive.

Rather than following the intensity and number of treatments mentioned in reviews,

check your skin thickness, amount of facial fat, and any pre-existing cheek hollowing,

then determine the appropriate mode and treatment areas.

Gachisan Station InMode Side Effects: How Much Bruising from FX and Heat from Forma Is Acceptable? image 11

Frequently Asked Questions

Q1. Is bruising from FX common?

Circular red marks or bruising

may appear during the suction process.

However, if the affected area continues to expand

or pain and warmth worsen together,

visit a medical institution to have your condition checked.

Q2. Does Forma have almost no side effects?

Because Forma does not use suction,

its pattern of reactions may differ from that of FX.

That does not mean there will be no reaction at all;

redness and warmth, dryness, or tenderness

may occur.

Q3. Can I receive InMode treatment even if I have little facial fat?

After checking your skin thickness and amount of facial fat,

as well as any areas of existing hollowing,

the mode and treatment area should be determined.

If you have little facial fat,

a more careful plan is needed to avoid applying FX broadly to unnecessary areas.

Q4. If I develop a blister, can I apply ointment first?

Do not pop it yourself

or apply ointment from home without guidance.

Take a photo and contact the medical institution where you received the treatment

to receive instructions appropriate for your current condition.

Thank you for reading this long post today.

This has been Kim Ha-won from Beauty’s Doctor.

Gachisan Station InMode Side Effects: How Much Bruising from FX and Heat from Forma Is Acceptable? image 12

Gachisan Station InMode Side Effects: How Much Bruising from FX and Heat from Forma Is Acceptable? image 13

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