8.5 Electrotherapy Modalities: High Frequency, Galvanic & LED Light

Electrotherapy Modalities: High Frequency, Galvanic & LED Light

Electrotherapy utilizes electrical currents to treat the skin. These modalities can enhance the results of a facial by deeply cleansing pores, reducing surface bacteria, and helping active ingredients penetrate the epidermis.

Read Tennessee's Limits First

Before any modality, note two prohibitions in Rule 0440-02-.16 that override anything a device manufacturer tells you:

Paragraph (5)(a) is the one that surprises people. Any modality whose purpose or effect is to contract the facial muscle falls within the invasive procedures the rule prohibits — which is why the "muscle re-education" and "non-surgical facelift" language used to market some devices describes exactly what Tennessee bars an aesthetician from doing. Paragraph (6) means that so-called skin-tag or blemish "removal" devices sold to estheticians are outside the licence regardless of the seller's claims.

Electrotherapy Safety and Polarity

Understanding polarity is crucial, especially for Galvanic current.

• Anode (Positive Pole): Usually colored red, marked with a (+). It produces an acidic reaction, soothes nerves, decreases blood supply, and hardens tissues.
• Cathode (Negative Pole): Usually colored black, marked with a (-). It produces an alkaline reaction, stimulates nerves, increases blood supply, and softens tissues.

Always ensure the client has removed all metal jewelry before beginning an electrical treatment to prevent burns or shocking.

High Frequency (Tesla Current)

The High Frequency machine utilizes an alternating, oscillating current (Tesla current) that produces a thermal/heat effect. It does not produce muscle contractions. The current passes through a glass electrode filled with gas. When electrified, the gas ignites and produces ozone (O3), which is highly antibacterial.

Types of Electrodes / Gases

• Argon Gas (Violet/Blue Light): Used primarily for acneic and oily skin due to its strong germicidal effect.
• Neon Gas (Orange/Red Light): Used for aging, dry, or sluggish skin. It stimulates circulation and cellular metabolism.

Application Methods

• Direct Application: The esthetician holds the electrode and applies it directly to the client's skin, moving it in slow circular motions. Sparking (lifting the electrode slightly to create a stronger ozone spark) can be used on individual acne lesions.
• Indirect Application (Viennese Massage): The client holds the glass electrode (while it is turned off). The esthetician turns on the machine and massages the client's face. The current flows through the client and out through the esthetician's hands, stimulating the skin and aiding in product absorption.

Galvanic Current

Galvanic current is a constant and direct current (DC) that uses positive and negative poles to produce chemical changes in the skin. It has two primary functions in esthetics: Desincrustation and Iontophoresis.

1. Desincrustation (Anaphoresis)

Used to facilitate deep pore cleansing, especially for oily/acneic skin.

• How it works: An alkaline, negatively charged solution is applied to the skin. The esthetician uses the negative electrode (cathode) on the face, while the client holds the positive ground.
• The Chemical Reaction: The negative current creates a chemical reaction called saponification, which turns sebum (oil) into soap. This softens and liquefies comedones, making extractions incredibly easy.

2. Iontophoresis (Cataphoresis)

Used to introduce water-soluble products deep into the skin.

• How it works: An acidic, positively charged serum (like a Vitamin C ampoule) is applied to the skin. The esthetician uses the positive electrode (anode) on the face. Because like charges repel, the positive electrode pushes the positive product deep into the epidermis.

LED Light Therapy

Light Emitting Diode (LED) therapy uses non-thermal visible light to trigger cellular responses. It does not use electrical current flowing through the body.

Wavelengths and Benefits

• Blue Light (approx. 415nm): Used for acneic skin. It targets Cutibacterium acnes (formerly Propionibacterium acnes), the bacterium associated with acne.
• Red Light (approx. 630nm): Used for anti-aging. It stimulates fibroblasts to produce collagen and elastin, improving skin tone and texture.
• Yellow/Amber Light: Reduces inflammation, swelling, and redness. Ideal for sensitive or rosacea-prone skin.
• Infrared Light: Invisible to the naked eye, it penetrates the deepest, providing deep tissue healing and pain relief.

Microcurrent and the Tennessee Boundary

Microcurrent applies a very low-level current that is marketed as mimicking the body's natural electrical energy, improving circulation and increasing ATP (adenosine triphosphate) production. It is widely advertised as a "non-surgical facelift" that re-educates and tones facial muscles.

That marketing language is precisely the problem in Tennessee. Rule 0440-02-.16(5)(a) lists the application of electricity which contracts the muscle among the invasive procedures that shall not be used. A Tennessee aesthetician must not deliver or advertise a service on the basis that it contracts facial muscle, and should treat any device sold on that premise as falling within the rule. On an examination item, the correct answer is that muscle-contracting current is prohibited — not that it is permitted with training or consent.

Contraindications for Electrotherapy

Electrical treatments carry significant risks for certain populations. You must completely avoid High Frequency, Galvanic, and Microcurrent if the client has:

• Pacemakers or heart conditions: The electrical current can interfere with the device.
• Metal implants in the body: Metal conducts electricity and can cause internal burns or discomfort.
• Pregnancy: Electrical currents should never be passed through a pregnant client's body.
• Epilepsy or seizure disorders: The electrical impulses or flashing lights (in LED) can trigger a seizure.
• Braces (for Galvanic): The metallic taste caused by the current will be severely amplified and uncomfortable.

Summary Table: Modalities

Mastering electrotherapy allows an esthetician to elevate a basic facial into an advanced, highly effective clinical treatment.