My friend's mum was shocked to see bruises appearing on her arm one day. She didn't recall any injury.In old people, skin dryness is very common (it's so dry that wrinkles have formed; see picture). It causes itch which leads to scratching. Again in old people, there is poor collagen support for the blood vessels, hence these superficial vessels break easily with very minor trauma such as scratching. The bruises that form will go away on their own with time, so there is no need for alarm. This is why it is important for old people to moisturize their skins regularly!
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