Spa refers to hydrotherapy, which generally includes aromatherapy, essential oil back opening, whole body oil pressure, bathing and so on. It can be divided into cold bath, hot bath, seawater bath and hot spring bath. According to different gender, the service will be different. Spa is a new health-keeping method improved from traditional health-keeping methods. Generally, it combines essential oil and aromatherapy, and plays light music to satisfy people's enjoyment of sight, touch, smell and hearing, and to some extent, it can alleviate the fatigue of modern people caused by work and study. The most commonly used and widely used essential oil in spa is lavender essential oil, which can sleep well, prevent insects, resist bacteria and accelerate wound repair. It is one of the few essential oils that can be directly applied to the body. It can also calm the mood and promote the blood circulation and metabolism of the human body during massage.