How should a 14-year-old son who suffers from daily enuresis, especially on cold days, behave, and is it permissible for him to perform tayammum due to the difficulty of ghusl?

Removing impurities from the body is a condition for the validity of prayer. So, if a person urinates in their sleep or becomes stained with impurities, what is required is to wash only the soiled part with warm water. One can take precautions by wearing a diaper before sleep. If this is not possible, and one cannot find means to warm the water and fears harm from cold water, then according to some jurists, one may perform tayammum (definition) (dry ablution). Wudu (ablution with water) is necessary to remove the ritual impurity, as it usually poses no hardship.