The reason for weak swallowing muscles could be due to oropharyngeal or oesophagal. Oropharyngeal dysphagia is a disorder that weakens the muscles and makes it difficult to swallow without gagging or choking. The causes for this disorder are neurological conditions like Parkinson’s, radiation therapy, stroke, or multiple sclerosis. It can also be caused by head and neck cancer. Oesophagal dysphagia is the feeling of something is trapped in your throat. This can be caused by swelling, narrowing, tightening or spasm in the oesophagus.