For those with sensitive teeth and bleeding gum, brushing and cleaning interdental spaces can create pain and discomfort. Tooth sensitivity occurs as a result of receding gum and exposed dentin. Also, brushing too hard can damage enamel and cause the recession of gum. The build-up of plaque may cause gum disease which leads to gum bleeding and sensitivity. Pick a soft brush with fine bristles to reduce abrasion on tooth structure and to better cleanse the gum line. A toothbrush with a compact brush head allows you to brush hard-to-reach areas, like back teeth, which can be easily missed when brushing with a normal-sized brush head.