21. Dysphagia can result from any disorder that weakens or injures the nerves or muscles involved in swallowing.22. If reflux disease is causing dysphagia , daily treatment with medication to counteract stomach acid is essential. 23. These can cause symptoms including difficulty swallowing ( dysphagia ), upper abdominal pain, and vomiting. 24. If swallowing problems ( dysphagia ) occur, they typically present during the second decade of life. 25. Thickening agents can also be used when a medical condition such as dysphagia causes difficulty in swallowing. 26. Dysphagia is classified by the deficit area such as oral, pharyngeal, oropharyngeal and esophageal dysphagia.27. Dysphagia is classified by the deficit area such as oral, pharyngeal, oropharyngeal and esophageal dysphagia . 28. The dysphagia may be due to an over growth of muscle tissue or strictures in the oesophagus. 29. Gastrointestinal symptoms quickly progress to severe nausea, vomiting, diarrhea, and difficulty swallowing ( dysphagia ). 30. Swallowing difficulties ( dysphagia ) are not commonly seen in vocal fold paresis that results from RLN damage.