"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." Waking up in the morning with a bruise you don't remember getting is not unusual. But if this starts to ...

Dear Doctor: I tripped on a curb and hit the pavement pretty hard. I didn’t break a bone, but after a few days, the area around my knee started to hurt and got very sensitive. I’m told this is a bone ...

Waking up in the morning with a bruise you don't remember causing is not unusual for anybody. But if this starts to happen more and more often, or if you start to develop bruises from seemingly minor ...