Varun, also known as Crataeva nurvala, is a tree that is commonly used in Ayurvedic medicine for its medicinal properties. The bark of the Varun tree is particularly useful in treating urinary tract infections (UTIs) and kidney stones.

The bark of the Varun tree has diuretic properties, which means it can help increase the production of urine and improve the function of the urinary tract. This can help flush out toxins and bacteria that may be causing a UTI or kidney stone.