Dysphagia refers to difficulty with swallowing with its cause somewhere between the mouth and the stomach. Dysphagia is not a disease, but rather a symptom of a disease, or an alteration to anatomy (central or peripheral) that negatively impacts the swallow physiology. However, it is possible to have altered anatomy or physiology, yet still have a safe and efficient swallow. This differs from a feeding disorder, which may be related to either poor food placement in the mouth, or in the case of an infant, an inability to suck or coordinate the suck-swallow-breathe.
To learn more, this information is covered in Chapter 2 of Swallowing and its Disorders Across the Lifespan.
What to do if you have problems with swallowing? Find a professional