In a small saucepan, heat the witch hazel over low heat until warm to the touch (about 130 degrees).
Add the salt and stir until dissolved.
Using tweezers or gloves, add the menthol crystals to the witch hazel and stir until dissolved. Avoid touching menthol with your hands, as it can sting eyes or other sensitive areas if you touch them afterward.
When the menthol is dissolved set the mixture aside to cool.
When it is cool, add the aloe vera gel, apple cider vinegar, and essential oils if using.
Carefully transfer the mixture to a spray bottle for use.
To use, spray and let dry on itchy skin. Store at room temperature or in the refrigerator.