A more accurate term would be hemoglobin level of 12.5. Which is in a cbc, a complete blood count. 12.5 is with in most normal ranges. If they were talking about wbc count white blood cell count 12.5 is elevated. Have your doctor explain your laboratory values with you.
If by a sore you have a lesion of some type see a doctor.Lesion that don't heal could be some type of carcinoma.
You might have torn you rota-tor cuff ligament