HIFU Safety and Contraindications: Who Should Not, Where Not to Treat

• Absolute: active infection or open wounds in the area, acute phase over threads or fillers (some deform under heat), implanted electronics (pacemaker territory), pregnancy and lactation (by caution).
• Relative: poorly controlled diabetes, keloid tendency, moderate-severe rosacea, very thin facial fat (atrophy risk), recent retinoid use (fragile barrier).

• Periorbital: never on the globe; inside the orbital rim only dedicated shallow cartridges at reduced energy.
• Temple: frontal branch of facial nerve and superficial temporal artery; superficial high energy risks brow ptosis.
• Parotid and posterior jawline: facial nerve course and parotid duct projection.
• Anterior neck: thyroid, trachea and carotid sinus are off-limits.
• Bony prominences (zygoma, gonial angle, frontal ridge): strong pain and periosteal heat accumulation.

• Bruising and edema: most common, days; stopping anticoagulant supplements pre-treatment helps.
• Transient numbness or mild nerve irritation: most resolve within weeks; beyond 4 weeks needs specialist review.
• Fat atrophy and indentation: from excess energy or frequency — prevention is everything.
• Burns and blisters: poor coupling or faulty cartridges; SOP checks and device self-tests prevent.

1. Documented screening for indications and contraindications.
2. Written energy/zone templates; no improvised escalation.
3. Cartridge shot and status checks in the SOP.
4. Complication pathways and referral plans.

Filler and HIFU — compatible?

After hyaluronic acid, wait 2-4 weeks and avoid stacking high energy directly; some materials (e.g., PMMA microspheres) carry higher heat risk and need case review.

Can HIFU accelerate aging?

Proper energy does not; over-frequent treatment consumes fat pads and support structures and can age the face — “less but precise” is the long-term strategy.

• HIFU
• Focal Depth Selection
• Clinical Validation and Safety Standards