Photo-thermal vs. Photo-acoustic Effects

What are Photothermal effects?

Photothermal lasers use controlled heat to target specific structures in the skin—such as pigment, vessels, or hair follicles. The energy converts to heat, which gently destroys the target while leaving surrounding tissue unharmed. These lasers are typically used for hair removal, vascular treatments, and skin rejuvenation.

What are Photoacoustic effects?

Photoacoustic or photomechanical lasers deliver extremely short, high-energy pulses that create a mechanical impact rather than heat. This “shockwave” effect breaks down pigment particles with minimal thermal damage, making them ideal for tattoo removal, addressing pigmentation concerns, and achieving precise skin revitalization.

What does the Patient Experience?

Patients experience photothermal and photoacoustic lasers differently due to how each interacts with the skin. Photothermal treatments create a brief warm “snap” or tingling sensation as the heat targets pigment, vessels, or follicles—often compared to a light rubber band flick, with cooling used to enhance comfort. Photoacoustic or photomechanical lasers feel more like a quick, precise “pop” or tapping sensation caused by ultra-fast shockwave energy rather than heat. Both effects are well-tolerated, fast, and designed to prioritize patient comfort and safety at the forefront.