Salt water foot soak is generally not harmful, if the skin in the feet have infected breaks or the water temperature is too high and so on, it may cause skin irritation reaction, rashes and other allergic phenomena. Salt water foot soak can accelerate the body’s blood circulation, and soak your feet at night to help you sleep. However, too high a water temperature can lead to excessive stripping of the skin’s surface cortex, and the skin can become dry, itchy or even cracked. In cases where the skin itself is infected and broken, it may cause localized pain, aggravated lesions and infection. In the event of any physical discomfort during the use of salt water foot soaks, you should consult a medical professional for help to avoid adverse consequences.