The main cause of most bruises is when something collides with your skin. There are many possible situations where this could occur, including bumping into something, falling over or playing a contact sport.
Bruising might become more common as you get older. That’s because your skin gets thinner and your body will generally become more fragile. You might find that something which wouldn’t have caused a bruise in your younger days now leaves you with a mark.
Bruising can also be a side effect of certain medicines. For example, you might be on medication designed to thin your blood. It’s important that you pass this on to our doctors as it will affect the treatment they recommend.