Cannabis Topicals: How They Work Explained

Key Takeaways

• Cannabis topicals interact with CB1 and CB2 receptors found directly in the skin, muscles, and peripheral nerves
• Most topicals — including those containing THC — do not produce a high because cannabinoids don't reach the bloodstream in significant amounts[2]
• Transdermal patches are a notable exception and can deliver cannabinoids into the bloodstream
• CBD concentrations in topicals commonly range from 3-8 mg per ounce of product[3], while THC-infused topicals may contain 1-10 mg THC per single application
• Terpenes like myrcene, linalool, and beta-caryophyllene may enhance topical absorption and contribute additional effects[4]

What Is the Endocannabinoid System and Why Does It Matter for Cannabis Topicals?

To understand how cannabis topicals work, you first need to know about the endocannabinoid system (ECS). The ECS is a network of receptors, enzymes, and naturally occurring cannabinoids found throughout the human body — including in the skin[1].

Two primary receptor types, CB1 and CB2, are distributed across multiple layers of the skin, including the epidermis and dermis. When you apply a cannabis-infused topical, the cannabinoids bind to these local receptors without needing to travel through the bloodstream to reach the brain[2].

This is why the experience of using a topical feels fundamentally different from smoking, vaping, or consuming an edible.

The Role of CB1 and CB2 Receptors in the Skin

CB2 receptors are particularly abundant in skin tissue and are associated with the body's peripheral systems. CBD (cannabidiol) shows a strong affinity for CB2 receptors, while THC primarily activates CB1 receptors[1].

Both cannabinoids are commonly used in topical formulations, often together, to take advantage of what researchers call the "entourage effect" — the idea that cannabinoids and terpenes work more effectively in combination than in isolation[4].

Why Don't Cannabis Topicals Get You High?

This is one of the most common questions consumers ask, and the answer lies in skin permeability. Human skin is a highly effective barrier, and cannabinoid molecules — particularly THC — are large and lipophilic (fat-loving), making it difficult for them to penetrate deeply enough to enter systemic circulation[2].

Studies have shown that standard topical application results in cannabinoids remaining concentrated in the localized skin layers rather than reaching the bloodstream at detectable levels[5]. For this reason, even topicals labeled as containing THC are generally considered non-intoxicating when applied to intact skin.

Transdermal Patches: The Exception to the Rule

Transdermal cannabis patches are specifically engineered to breach the skin barrier using permeation enhancers — ingredients that temporarily increase skin permeability. Unlike a lotion or balm, a transdermal patch can deliver cannabinoids into the bloodstream, producing systemic effects[5].

Consumers should be aware of this distinction when selecting a topical product, especially those subject to workplace drug testing.

What Role Do CBD, THC, and Terpenes Play in Cannabis Topicals?

Not all cannabis topicals are created equal. The cannabinoid and terpene profile of a topical product significantly influences the experience[4].

CBD-dominant topicals are the most widely available and are favored by consumers who want to avoid any psychoactive risk. CBD topicals typically range from 3 mg to 8+ mg of CBD per ounce of product[3], with higher-potency formulations marketed for more intense localized use.

THC-containing topicals are available in legal cannabis markets and may contain 1–10 mg THC per single application. These are often combined with CBD in a 1:1 ratio to leverage the entourage effect[4].

Terpenes are aromatic compounds found naturally in cannabis that may play an underappreciated role in topicals. Key terpenes to look for include:

• Myrcene — found in strains like Blue Dream and OG Kush; may support absorption through the skin due to its ability to influence cell membrane permeability
• Linalool — common in lavender and cannabis strains like Zkittlez; associated with calming aromatic properties[4]
• Beta-caryophyllene — uniquely binds to CB2 receptors directly, making it especially relevant in topical formulations[6]

Looking for a topical with beta-caryophyllene? Seek out products formulated with full-spectrum extracts from strains known to be high in this terpene, such as Girl Scout Cookies or Sour Diesel.

How Do You Choose the Right Cannabis Topical?

With dozens of product formats on the market — balms, salves, lotions, roll-ons, and patches — selecting the right topical comes down to a few key factors:

• Format matters: Thicker balms and salves tend to sit on the surface longer, while lotions absorb more quickly
• Cannabinoid ratio: CBD-only products are available nationwide; THC-containing topicals require access to a legal cannabis market
• Full-spectrum vs. isolate: Full-spectrum products retain terpenes and minor cannabinoids, potentially enhancing effects through the entourage effect[4]
• Potency: Higher mg-per-ounce concentrations are generally preferred for more targeted use
• Third-party testing: Always look for a Certificate of Analysis (COA) confirming cannabinoid content and the absence of contaminants[3]

Conclusion

Cannabis topicals offer a unique delivery method that works locally through the skin's endocannabinoid system — bypassing the bloodstream and the psychoactive effects most people associate with cannabis[1]. Whether you're drawn to a CBD salve with linalool and myrcene or a full-spectrum THC balm featuring beta-caryophyllene-rich strain extracts, understanding the science behind topicals helps you make a smarter, more informed purchase.

Start by reading the label carefully, verifying third-party lab results, and considering whether a standard topical or a transdermal patch better fits your needs.

Ready to explore more cannabis science? Check out our guides on cannabinoids, terpene profiles, and strain recommendations at The Green Leaf.