Washing your skin with hot water is not advisable as it can aggravate skin problems.
For cleansing face neither hot nor cold water is recommended. Luke warm water is your best choice.
Here are a few ways in which using hot water can harm the skin.
Using hot water can lead to skin irritation and red blotches.
Using hot water can strip the skin of its natural oils, leaving it really dry.
Hot water also slows down the formation of collagen and sebum, leading to the formation of fine lines and other signs of aging.
If you come back from a hot environment and wash your face with hot water, it can lead to dark spots and permanent scarring.
Using hot water can scald the skin leading to red patches and extreme sensitivity in those areas.