<p>Topical urea is bacteriostatic, bactericidal, fungistatic, proteolytic, hygroscopic and has mild local anesthetic properties. These actions are dose dependent. Most of its therapeutic applications depend on its hygroscopic properties. The hygroscopic property is due to its ability to cause configurational change in proteins in the stratum corneum. A 10% urea cream has been shown to increase the water holding capacity of ichthyotic scale by 100% after 3 weeks of treatment. There is no information available about percutaneous absorption of urea. Therapeutic effects depend on local concentrations, not on systemic absorption of the drug. If absorbed, urea would be excreted unchanged in the urine.</p>