Showering in boiling water not only damages your skin: it also causes insomnia and high blood pressure. A very hot shower strips our hair and body of their natural oils, which can result in dry, flaky, itchy skin.
The heat from a boiling shower causes blood vessels to dilate, which requires the heart to work harder to maintain blood flow. The study also talks about the possibility of burning your skin and says that shower heads can grow bacteria and fungi if they are not cleaned often.