If it is raw water that is not contaminated with heavy metals, etc., you can drink it after boiling. However, if the water is contaminated with heavy metals, pesticides, etc., you cannot drink it after boiling.
Raw water generally refers to water that has not been sterilized and filtered, such as well water, river water, stream water, etc., but there may be more bacteria or eggs, and by boiling at high temperature, can kill bacteria and eggs in the raw water, it can be drunk after boiling, and will not cause harm to the body after drinking.
If the water is contaminated by heavy metals, pesticides or municipal waste, it is not recommended to drink it even if it is boiled. Although the high temperature can kill the bacteria or eggs in the water, but can not remove the pollutants in the water, after drinking it will easily lead to physical discomfort.
Try not to drink raw water or tap water, try to drink some warm water.