Plumbago zeylanica, commonly known as Ceylon leadwort or Chitrak, is traditionally used in Ayurvedic and other folk medicinal systems for a variety of ailments, including skin conditions like itching (pruritus). Traditional texts like the Charaka Samhita and Sushruta Samhita mention its use in formulations for skin diseases, pruritus, and leprosy. The root paste is sometimes applied topically to relieve itching and other dermatological symptoms, and it is included in multi-herb preparations for skin health.

However, the scientific validation for its specific anti-pruritic (anti-itch) effects is limited. Some studies have demonstrated that Plumbago zeylanica contains naphthoquinones such as plumbagin, which have anti-inflammatory, antimicrobial, and antioxidant properties. While these activities could contribute indirectly to alleviating conditions that cause itching (such as infections or inflammation), there is a lack of direct experimental or clinical evidence specifically confirming its efficacy against itching in humans.

In summary, the use of Plumbago zeylanica for itching is primarily justified by traditional practice, with some plausible pharmacological rationale but limited direct scientific evidence. Caution is advised since the root can be irritant and toxic in higher doses.