Laser
A laser is a beam of light of a single wavelength that targets something in the skin: water, pigment or hair. Dr. Karen von Kossel's office has its own laser and offers three kinds of treatment: fractional laser for texture, pores, acne scars and spots, laser hair removal, and subdermal laser (Endolift) for skin laxity on the face and neck.
Summary
- Fractional laser session
- 30 to 60 minutes, with numbing cream beforehand
- Fractional laser recovery
- Redness and roughness for 3 to 7 days
- Fractional laser sessions
- Usually 3, up to 3 months apart
- Laser hair removal
- Sessions every 30 days on the face, further apart on the body
- Endolift
- One session, which may be repeated after about 1 year
- Assessment
- Dr. von Kossel examines the skin before choosing the laser and its settings
Fractional laser (Fraxx)
Fractional laser creates microscopic columns of heat in the skin and leaves the skin around them intact, which speeds up recovery. The skin produces new collagen over the following months. It is used for uneven texture, enlarged pores, acne scars, fine lines and some types of spots.
Before the session, a numbing cream is applied for about 40 minutes. Afterwards the face stays red and warm for a few hours and rough for a few days. Makeup can be used again after 2 to 3 days, depending on the settings used.
Laser hair removal
The light is absorbed by the pigment in the hair and heats the root. It works best on dark hair. White, blond or red hair responds poorly. Several sessions are needed, because the laser only reaches hair in its growth phase.
Endolift
In Endolift, a thin optical fiber is placed under the skin with local anesthesia and heats the tissue from inside. It is used for skin laxity along the jawline, under the chin and on the neck. Swelling for a few days is expected.
When to wait
Laser treatment is postponed when the skin is tanned, during pregnancy, with active herpes in the area, during isotretinoin treatment and for up to 3 months after it ends, or while taking medication that makes the skin sensitive to sun. Tell the doctor about everything you use.
Aftercare
Sunscreen every day, the moisturizer the doctor recommends, no scrubs or acids in the first week and no direct sun on the treated area during the first weeks.
Frequently asked questions
Does laser treatment hurt?
Fractional laser is done with numbing cream and feels like strong heat. Laser hair removal feels like a quick snap, similar to a rubber band. Endolift is done under local anesthesia.
Can I have laser treatment in summer?
Yes, as long as the skin is not tanned and you can avoid direct sun in the following weeks. Many patients prefer fractional laser in autumn and winter.
How many laser hair removal sessions are needed?
Usually 6 to 10, depending on the area, hair color and skin. Some people need maintenance sessions later.
Last updated November 10, 2026 · Medical director (responsável técnica): Dr. Karen von Kossel, CRM-SP 107714 · RQE 58534