Why is Wei Zishu also called prurigo tree?

Itch tree is the most commonly used nickname of Lagerstroemia indica. The tree of Lagerstroemia indica is hard, and the biggest feature is that the roots and parts are almost the same thickness. Its head is heavier than ordinary trees, which makes people feel top-heavy and easy to shake after a gust of wind. When we push it a little, it will shake. In fact, there is no such really ticklish tree. The cortex of a tree does not have cells and feelings like animal cortex, but is the image of Lagerstroemia indica. Lagerstroemia indica is a deciduous shrub or small tree, with a height of about 7 meters, smooth and shiny bark, gray or brown bark, many twisted branches, thin small branches, 4-sided, like spreading wings, leaves grow together or in pairs, the leaves feel like paper, the leaves are oval, and the leaves are about 2.5-7 cm long. It is about 1.5-4 cm wide, and its flowers are reddish or purplish white. Flowers are about 3-4 cm in diameter, and flowers with a length of 7-20 cm grow on them.