 [ Symptoms ] i have a dry scaly looking rash on my arms neck and mid back it is really itchy  i have a dry scaly looking rash on my arms neck and mid back it is really itchy on my neck and arms it looks like white spots on my back it is brown spots [ Disease ] hi from www healthgrades com come this answer a low wbc count is often linked to problems with the bone marrow and the inability to make enough white blood cells autoimmune diseases that attack your white blood cells can also lead to a low wbc count several different prescribed drugs including chemotherapy are known to decrease wbc production or destroy wbcs hope this helps you good luck