Topical Product Safety: Skin Irritation, Allergies and Added Ingredients

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If a cannabinoid product causes burning, blistering, swelling, a spreading rash or trouble breathing, stop using it and get medical care. In the US, Poison Help is 1-800-222-1222 for poisoning questions, and 911 is the emergency number. Products can be reported to the FDA through MedWatch (1-800-FDA-1088). [1] Keep products away from children; see accidental child and pet exposure.

What the trials found

The topical CBD trials we read reported few or no adverse events: no adverse events in a thumb-arthritis trial and a foot-neuropathy trial, and similar toxicity scores to placebo in a cream trial. [2][3][4] A systematic review called adverse events uncommon and mild but said that such data mean little when efficacy is unproven, and that reporting was poor. [5] Small, short trials cannot detect rare reactions or long-term effects.

Skin reactions: irritation and allergy

• Irritant reactions come from direct skin damage; allergic contact dermatitis is an immune reaction that develops after sensitization. A 2025 review of cannabis-related skin effects lists allergic contact dermatitis among the reported complications and says causes and diagnosis need more study. [6]
• Animal finding. In mice, repeated skin application of the terpene beta-caryophyllene caused itch and dermatitis, while CBD at all tested concentrations did not cause scratching or dermatitis. [7] This is preclinical; it cannot be applied to people, but it shows why the full recipe matters, not only CBD.
• Patches add adhesive and occlusion, which can irritate or sensitize skin. [8]

Added ingredients

A cream is mostly other ingredients. Labels can list oils, waxes, fragrances, preservatives and cooling or warming agents. We could not verify an FDA burn warning page this session (the page was not readable), so we make no claim from it. What we did read:

• Camphor and menthol. MedlinePlus lists camphor and menthol as potentially harmful ingredients, names topical pain relievers among products containing camphor, lists skin irritation among symptoms, and advises removing camphor-containing medicine from skin with soap and lukewarm water. [9]
• Menthol-containing medicine. For a benzocaine and menthol product, MedlinePlus says to stop use and call a doctor if itching, rash or irritation appears. [10]

A cannabinoid product that also contains cooling or warming agents should be read as two products in one. See how to read a CBD label.

Product-specific research

Safety findings for one cream do not carry over to another. Studies tested particular formulations (for example an isolate cream, a shea butter product, an oil), often with unspecified other ingredients. [5] Product content may differ from the label; see adulterated and mislabeled products.

Who should ask a clinician first

People with eczema or other skin disease, people using prescription medicines (see CBD and medication interactions), pregnant or breastfeeding people (cannabis and CBD in pregnancy and breastfeeding), and parents considering any product for a child. We do not give use instructions.