Synopsis

Source of validity: Scientific
Rating (out of 5): 3

Camphor has a long history of use in traditional medicine for relieving itching (pruritus), and there is also some scientific validation for its use in this context. Camphor is a naturally occurring terpene that, when applied topically in low concentrations (typically 3-11%), acts as a counterirritant. It produces a cooling sensation by activating and desensitizing sensory nerve endings, specifically the TRPV1 and TRPA1 receptors, which can help mask the sensation of itching and provide symptomatic relief.

Several over-the-counter topical preparations, such as ointments and creams, include camphor as an active ingredient for the temporary relief of itching associated with minor skin irritations, insect bites, and rashes. The US FDA recognizes camphor as a safe and effective external analgesic and antipruritic agent when used appropriately. However, scientific studies directly assessing camphor's efficacy in treating itching are limited, and most evidence is based on its mechanism of action and historical usage, as well as supportive data from its use in combination with other agents (such as menthol).

In summary, while there is a strong traditional basis and plausible physiological mechanism for camphor's use in treating itching, direct scientific evidence is moderate, and its effectiveness is generally accepted for mild, temporary itch relief. Care must be taken to avoid excessive application, as high concentrations of camphor can be toxic.

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Other ingredients used for Itching

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