A quick shower can do wonders, believe me. Bathing with candles, music, and sweet smelling bath oils can also relieve stress and clean mind. Hot showers cause your entire body to go into a relaxing mode. In cold a cold environment, your muscles tend to contract in order to trap heat/energy as well as body fluids. When taking a hot shower, your muscles tend to relax and become less tense, blood vessels become dilated. When this happens, it promotes healing faster because blood is able to circulate faster as well as to 'really hard to reach' areas in your body and also because the blood's nutrients can be supplied to various tissues around the body.