Scabs should form over any cut or graze, they are a sign that the cut or graze is healing properly. A scab is made up of dried up blood, which protects you against germs. It�s tempting to fiddle with scabs and pick them off, but try not to. Interfering always makes the cut or graze take longer to heal and means it could also leave a scar.
You could try rubbing moisturiser into the scab, but covering it up might slow down the natural healing process of drying out and falling off. Some make up might help I guess if it really is that important.