Hello! I read carefully your query and understand your concern. The deficiency of Vitamin D cause bone pain and muscle weakness and Iron deficiency cause anemia. The vitamin D deficiency isn t directly associated with spontaneous bruises. Before telling that these deficiencies are the cause of your spontaneous bruises you need to do some examinations to exclude other causes. Bruise irrespective of location without trauma needs a little work up such as : -Hematological assessment is advised,which includes PT,APTT,INR,platelets count.Only complete blood count is not enough to evaluate the ability of your blood to coagulate. I suggest to consult a physician and get the tests done in order to sort out the etiology of these signs.