Those who have swallowing difficulties , must mind their iron diet , as to take down ones own saliva  it takes lots of courage and energy expenditure by the blood , if RBC (which makes blood thicker and powerful) are weaker than patient start getting difficulty in swallowing , most of the time these problems are suffered by females as they are prone candidate for anemia which is thinned blood (weaker blood) , we say so because thinned blood has decreased oxygen content , this is why blood gets weaker to carry  out the swallow thing , so to improve that just have good iron meals and daily put some iron content in your diet , for more details go to