Achalasia is a medical condition of the oesophageal, due to failure of the lower oesophageal spincter to relax, and also aperistalsis of the body of oesophagus. Usually, patient may initally presented with dysphagia to both solid and liquid. Most patient will complaint dysphagia, predominantly to solid food. Sometime, regurgitaion of food may occur. They can have some weight loss as well. Patient can also presented with chest pain and symptoms of heartburn/reflux. Usually, gastrosocpy and follow by oesophageal manometry are the investigation of choice for patient with dysphagia. In patient with achalasia, the typical investigation - oesophageal manometry will show lack of peristalsis in the body of oesophagus, and also abnormal or absent of lower oesophageal sphincter relaxation for swallowing.