My skin itches at night and it has nothing to do with feng shui. You can check it yourself. First of all, you should know whether you are allergic to the skin. A simple way to check is to scratch the skin to make the scratched skin appear white marks, or press the skin with your nails to make it sag. After three or five minutes, red marks appear where you scratch or press, which belongs to allergic skin. Secondly, buy a thermometer. Look at the humidity in the bedroom at night. Generally less than 40% should be dry.
Allergic skin should go to the hospital to find a doctor for treatment. A dry bedroom can also cause itchy skin. The simple solution is to put some water in the washbasin of the bedroom when sleeping, and increase the humidity through evaporation of water.