An esophageal motility disorder is any medical disorder causing difficulty in swallowing, regurgitation of food and a spasm-type pain which can be brought on by an allergic reaction to certain foods. The most prominent one is dysphagia. It is a part of CREST syndrome, refers to the five main features: calcinosis, Raynaud's phenomenon, esophageal dysmotility, sclerodactyly and telangiectasia.
Dysphagia could be for solid only or for solid and liquid. 1) Solid Dysphagia is due to obstruction such as Esophageal Cancer, Esophageal web, or Stricture. 2) Solid plus liquid dysphagia is due to Esophageal motility disorder (or dysmotility) either upper esophagus (Mysthenia graves, stoke, or Dermatomyositis) or Lower esophagus (systemic sclerosis, CREST syndrome, or Achalasia)