Can a hematoma of the thigh cause numbness. I fell heavily 4 days ago and no bruising has come out but it is very sore and feels numb around the site where it hurts?

When you fall and injure your leg, it is possible that you injured the nerves, causing it to feel numb. Sometimes a visible bruise or hematoma will show up, but not always. It may take a week or more to begin to notice healing from this type of injury.