January 04, 2026

Skin Laxity: Causes and How Focused Ultrasound Treatments Work

Key Takeaways

  • Understanding the Cause: Skin laxity is a common biological process associated with ageing and changes in collagen and elastin. Environmental factors such as sun exposure may contribute to this process.

  • A Non-Surgical Option: Focused ultrasound is a non-invasive procedure that works by delivering energy to targeted layers of the skin to support collagen production over time.

  • Individualised Care: Treatment planning should be personalised and based on a professional consultation, with appropriate follow-up and aftercare.

Understanding Skin Laxity

Noticing changes in skin firmness is common over time. This change, known as skin laxity, occurs as the skin’s structural proteins naturally decline with age. While this process is normal, a range of non-surgical aesthetic treatments are available that may help support skin firmness and overall skin quality.

This guide explains what skin laxity is, the biological factors involved, and how focused ultrasound is used as a treatment option.

What Is Skin Laxity?

Skin laxity refers to a reduction in skin firmness and elasticity. It may appear as looseness around areas such as the jawline, neck, or body. Ageing is the primary contributor, however factors including cumulative sun exposure, gravity, lifestyle, and environmental influences may also play a role.

The Science Behind Skin Laxity

Collagen and elastin are proteins that help maintain skin strength and elasticity. Over time, the body’s natural production of these proteins slows, and existing fibres can degrade. This occurs due to:

  • Intrinsic ageing: Natural, genetically determined changes

  • Extrinsic factors: Sun exposure, smoking, pollution, and other environmental influences

Together, these factors can affect the skin’s underlying support structure, leading to visible changes in firmness and tone.

How Focused Ultrasound Is Used for Skin Laxity

Focused ultrasound is a non-invasive procedure used in aesthetic practice to deliver ultrasound energy to specific depths within the skin.

  • Targeted Energy: Ultrasound energy is delivered to predetermined tissue depths, typically ranging between approximately 1.5 mm and 4.5 mm, depending on the treatment area.

  • Biological Response: The controlled delivery of energy is intended to stimulate the body’s natural wound-healing response, which may support collagen production.

  • Gradual Change: Any visible changes typically develop progressively over several months, as collagen renewal occurs.

Outcomes vary between individuals and depend on factors such as skin condition, age, and lifestyle.

Potential Benefits of Focused Ultrasound

Focused ultrasound may be considered by individuals seeking a non-surgical option to address skin laxity. Potential benefits may include:

  • Improved Skin Firmness: Some individuals experience improvements in skin tightness and texture.

  • Minimal Interruption to Daily Activities: The procedure is non-invasive and generally involves minimal downtime.

  • Progressive Results: Changes develop gradually and are not immediate, aligning with the natural collagen renewal process.

No cosmetic procedure can stop the ageing process, and results are not permanent.

About Ultraformer MPT

Ultraformer MPT is a device that uses high-intensity focused ultrasound with micro-pulsed technology. It is designed to deliver ultrasound energy to different layers of the skin, depending on treatment goals and practitioner assessment.

At Lisa Rush Skin Clinic, treatment plans are developed following a professional consultation to determine suitability and to discuss expected outcomes, potential risks, and alternative options.

What to Expect From a Focused Ultrasound Appointment

  • Consultation: A comprehensive consultation is conducted to assess your skin, discuss concerns, and determine whether treatment is appropriate.

  • Treatment Preparation: The skin is cleansed and a conductive gel is applied to the treatment area.

  • Procedure: Ultrasound energy is delivered using a handheld device. Sensations vary between individuals, and comfort is monitored throughout the session.

  • After Treatment: Most people resume normal activities immediately. Temporary redness, warmth, or tingling may occur and usually resolves within hours.

  • Follow-Up: Follow-up appointments may be recommended to review progress and outcomes.

Final Thoughts

Skin laxity is a natural part of ageing, and aesthetic treatments are a personal choice. Focused ultrasound is one option that may help support skin firmness for suitable candidates. A professional consultation is essential to determine whether this treatment aligns with your individual needs and expectations.

Important Disclaimer

General Information Only:
The information provided on this page is for general educational purposes only and does not constitute medical advice.

Individual Results Vary:
All cosmetic and aesthetic treatments carry potential risks and outcomes vary between individuals. No guarantees or specific results can be assured.

Consultation Required:
Suitability for treatment can only be determined following a comprehensive consultation with a qualified health practitioner. During this consultation, potential benefits, risks, alternatives, and expected outcomes will be discussed.

Regulatory Compliance:
Any therapeutic devices or treatments referenced are used in accordance with Australian regulatory requirements. This content does not replace advice from your treating practitioner.

Written by Lisa Rush