What makes some people bruise easily? and how to be less 'bruisey'?

Bruising: Bruising easily, even without trauma, could signify a medical problem that needs attention. Deficiency of vitamin k (found in dark green, leafy vegetables) also can cause you to bruise easily. A vitamin c deficiency could also be to blame. Also drug side effects could also cause it. I hope this helps and if it does, please vote for me. Thanks.