HIFU (High Intensity Focused Ultrasound) is one of the safest and most effective non-invasive treatments for facial and body rejuvenation. The original Ulthera platform was FDA-cleared under 510(k) K121466, and peer-reviewed safety reviews (e.g., PubMed 27538219) confirm its favorable safety profile. Millions of sessions are performed worldwide each year with excellent outcomes. However, like any medical procedure, it is not suitable for everyone. A thorough medical evaluation before treatment is essential to ensure your safety and achieve the best possible results.
At Elyzea, Dr. Geldres — a board-certified plastic surgeon with extensive knowledge of facial anatomy — performs a personalized assessment before every treatment. Here is what you need to know before scheduling your session.
Absolute Contraindications
HIFU should not be performed in the following cases:
- Pregnancy and breastfeeding: As a precaution, no focused ultrasound treatment is performed during pregnancy or breastfeeding. While there is no evidence of harm, the safety of the baby is the priority.
- Metal implants in the treatment area: Plates, screws, or other metallic devices in the area being treated can interfere with ultrasound energy. Important note: hyaluronic acid fillers are NOT a contraindication — they are not metallic and do not interact with HIFU.
- Open wounds, active infections, or severe active acne: The skin in the treatment area must be intact and free of infection. The session can be rescheduled once the skin has healed.
- Pacemakers or implanted electronic devices: Cardiac devices and other electronic implants may be affected by focused ultrasound energy.
- Severe blood clotting disorders: Patients with serious coagulation problems have a higher risk of bruising and complications.
- Active cancer or ongoing oncological treatment: HIFU is not performed on patients with an active cancer diagnosis or those currently receiving chemotherapy, radiation therapy, or other cancer treatments.
Relative Contraindications (Require Medical Evaluation)
In these cases, Dr. Geldres will evaluate your individual situation to determine whether HIFU is safe for you:
- Autoimmune diseases (lupus, scleroderma): Some autoimmune conditions can affect how the skin responds to treatment. Each case is evaluated based on disease activity and current medication.
- Recent thread lifts: It is recommended to wait at least 6 months after thread lift placement before undergoing HIFU in the same area.
- Recent dermal fillers in the area: If you received hyaluronic acid or another filler recently, we suggest waiting 2 to 4 weeks before your HIFU session.
- Active rosacea or highly sensitized skin: Inflamed or hypersensitive skin may react excessively to the ultrasound heat. In some cases, the protocol can be adjusted, or we may wait until the skin has stabilized.
- Isotretinoin (Accutane): If you are currently taking isotretinoin or recently completed treatment, it is recommended to wait at least 6 months before HIFU, as this medication alters skin healing and sensitivity.
Common Side Effects (Normal and Temporary)
HIFU is a safe treatment, but it is normal to experience some mild effects after your session. These are part of your skin's natural response and resolve on their own:
- Mild redness: Similar to what appears after sun exposure. It typically fades within a few hours.
- Mild swelling: Especially in sensitive areas such as the eye contour or jawline. It resolves within 24 to 48 hours.
- Tenderness to the touch: The treated area may feel slightly sensitive for 1 to 2 days.
- Tingling: A slight prickling sensation indicating collagen activation in the deep layers. It disappears within a few hours.
Rare Side Effects
- Minor bruising: This may appear on very delicate skin or in areas with superficial blood vessels. It resolves within 5 to 7 days.
- Temporary numbness: In rare cases, there may be a slight decrease in sensation in the treated area that recovers spontaneously within days or weeks.
Why Medical Evaluation Matters
HIFU may seem like a straightforward treatment — and in expert hands, it is. But the difference between an excellent result and a poor experience lies in who operates the equipment. Dr. Geldres, as a board-certified plastic surgeon, possesses a deep understanding of facial anatomy: the layers of the skin, the location of nerves and blood vessels, and the distribution of fatty tissue. This knowledge allows her to identify risks that non-medical operators might overlook.
At Elyzea, the pre-treatment evaluation is free and without obligation. If after the consultation we determine that HIFU is not the best option for you, we will recommend alternatives. It is always better to ask than to assume.